From 04a14bdf2805b3d3ed5e07b65062958568886e44 Mon Sep 17 00:00:00 2001
From: Shlomi Bitton <shlomibi@nvidia.com>
Date: Thu, 4 Mar 2021 14:15:32 +0200
Subject: [PATCH] DHCP relay for IPv6 HLD

Signed-off-by: Shlomi Bitton <shlomibi@nvidia.com>
---
 doc/DHCPv6_Relay/DHCPv6_Relay_HLD.md | 155 +++++++++++++++++++++++++++
 doc/DHCPv6_Relay/diagram.png         | Bin 0 -> 14143 bytes
 doc/DHCPv6_Relay/init.svg            |   3 +
 3 files changed, 158 insertions(+)
 create mode 100644 doc/DHCPv6_Relay/DHCPv6_Relay_HLD.md
 create mode 100644 doc/DHCPv6_Relay/diagram.png
 create mode 100644 doc/DHCPv6_Relay/init.svg

diff --git a/doc/DHCPv6_Relay/DHCPv6_Relay_HLD.md b/doc/DHCPv6_Relay/DHCPv6_Relay_HLD.md
new file mode 100644
index 0000000000..b2220fbe22
--- /dev/null
+++ b/doc/DHCPv6_Relay/DHCPv6_Relay_HLD.md
@@ -0,0 +1,155 @@
+# DHCP Relay for IPv6 HLD
+
+# High Level Design Document
+
+#### Rev 0.1
+
+# Table of Contents
+- [DHCP Relay for IPv6 HLD](#dhcp-relay-for-ipv6-hld)
+- [High Level Design Document](#high-level-design-document)
+      - [Rev 0.1](#rev-01)
+- [Table of Contents](#table-of-contents)
+- [List of Tables](#list-of-tables)
+- [List of Figures](#list-of-figures)
+- [Revision](#revision)
+- [About this Manual](#about-this-manual)
+- [Scope](#scope)
+- [Definitions/Abbreviation](#definitionsabbreviation)
+- [1 Requirements Overview](#1-requirements-overview)
+  - [1.1 Functional requirements](#11-functional-requirements)
+  - [1.2 Configuration and Management Requirements](#12-configuration-and-management-requirements)
+- [2 Modules design](#2-modules-design)
+  - [2.1 DHCP Relay for IPv6 build and runtime dependencies](#21-dhcp-relay-for-ipv6-build-and-runtime-dependencies)
+  - [2.2 DHCP Relay for IPv6 process in dhcp-relay container](#22-dhcp-relay-for-ipv6-process-in-dhcp-relay-container)
+  - [2.3 DHCP Monitor](#23-dhcp-monitor)
+- [3 CLI](#3-cli)
+- [4 Init flow](#4-init-flow)
+
+# List of Tables
+* [Table 1: Abbreviations](#definitionsabbreviation)
+
+# List of Figures
+* [DHCPv6 Diagram](#2-modules-design)
+* [DHCPv6 init flow](#4-init-flow)
+
+# Revision
+| Rev | Date     | Author          | Change Description                 |
+|:---:|:--------:|:---------------:|------------------------------------|
+| 0.1 | 03/04    | Shlomi Bitton   | Initial version                    |
+
+# About this Manual
+This document provides an overview of the implementation and integration of DHCP Relay for IPv6 feature in SONiC.
+
+# Scope
+This document describes the high level design of the DHCP Relay for IPv6 feature in SONiC.
+
+# Definitions/Abbreviation
+| Abbreviation  | Description                               |
+|---------------|-------------------------------------------|
+| DHCP          | Dynamic Host Configuration Protocol       |
+
+# 1 Requirements Overview
+
+## 1.1 Functional Requirements
+
+DHCP Relay for IPv6 feature in SONiC should meet the following high-level functional requirements:
+
+- Give the support for relaying DHCP packets from downstream networks to upstream networks using IPv6 addresses.
+- Provide the functionality as a seperate process running on dhcp-relay docker container.
+- Relaying messages to multiple unicast and multicast addresses.
+
+## 1.2 Configuration and Management Requirements
+
+- DHCPv6 trap should be enabled through the COPP manager when the DHCP relay feature is enabled and vice versa. 
+- Downstream network is the VLAN interface with the relay configuration. Global IPv6 address is required to be configured on that interface. 
+- Config DB schema should meet the following format:
+```
+{
+"VLAN": {
+  "Vlan1000": {
+    "dhcp_servers": [
+      "192.0.0.1", 
+      "192.0.0.2", 
+    ], 
+    "dhcpv6_servers": [ 
+      "21da:d3:0:2f3b::7", 
+      "21da:d3:0:2f3b::6", 
+    ], 
+    "vlanid": "1000" 
+    } 
+  }
+}
+```
+
+# 2 Modules design
+
+![DHCPv6 Diagram](/doc/DHCPv6_Relay/diagram.png)
+
+## 2.1 DHCP Relay for IPv6 build and runtime dependencies
+
+The DHCP Relay for IPv6 feature, same as the IPv4 version, will be based on the open source project 'isc-dhcp'.
+
+## 2.2 DHCP Relay for IPv6 process in dhcp-relay container
+
+A new process will run in parallel to the other process for IPv4 support.
+The new process will listen to DHCP packets for IPv6 and forward them to the relevant interface according to the configuration.
+For example, from the configuration described on the previous section, the following daemon will start:
+```
+admin@sonic:/# /usr/sbin/dhcrelay -6 -d --name-alias-map-file /tmp/port-name-alias-map.txt -l Vlan1000 -u 21da:d3:0:2f3b::7%Ethernet28 -u 21da:d3:0:2f3b::6%Ethernet28
+```
+
+## 2.3 DHCP Monitor
+
+The existing DHCP monitor will be enhanced in order to support monitoring for DHCP IPv6 as well.
+
+## 3 CLI
+
+The existing CLI will be enhanced to support configuring DHCP IPv6 along with the IPv4 support.
+
+**config vlan dhcp_relay add**
+
+Usage:
+```
+config vlan dhcp_relay add <vlan_id> <dhcp_relay_destination_ip>
+```
+Example:
+```
+admin@sonic:~$ sudo config vlan dhcp_relay add 1000 21da:d3:0:2f3b::7
+Added DHCP relay destination address 21da:d3:0:2f3b::7 to Vlan1000
+Restarting DHCP relay service...
+```
+
+**config vlan dhcp_relay delete**
+
+Usage:
+```
+config vlan dhcp_relay del <vlan-id> <dhcp_relay_destination_ip>
+```
+Example:
+```
+admin@sonic:~$ sudo config vlan dhcp_relay del 1000 21da:d3:0:2f3b::7
+Removed DHCP relay destination address 21da:d3:0:2f3b::7 from Vlan1000
+Restarting DHCP relay service...
+```
+
+**show vlan brief**
+
+Usage:
+```
+show vlan brief
+```
+Example:
+```
+admin@sonic:~$ show vlan brief
++-----------+----------------------+------------+----------------+-----------------------+-------------+
+|   VLAN ID | IP Address           | Ports      | Port Tagging   | DHCP Helper Address   | Proxy ARP   |
++===========+======================+============+================+=======================+=============+
+|      1000 | 21da:d3:0:2f3b::6/96 | Ethernet28 | untagged       | 21da:d3:0:2f3b::6     | disabled    |
+|           |                      |            |                | 21da:d3:0:2f3b::7     |             |
++-----------+----------------------+------------+----------------+-----------------------+-------------+
+```
+
+## 4 Init flow
+
+![DHCPv6 init flow](/doc/DHCPv6_Relay/init.svg)
+
diff --git a/doc/DHCPv6_Relay/diagram.png b/doc/DHCPv6_Relay/diagram.png
new file mode 100644
index 0000000000000000000000000000000000000000..5efe21dbe0df50465d828e78812d6775688e210b
GIT binary patch
literal 14143
zcmeHuWmr^g+b)75$`C3rlt`BhpmYdG2}4LqcSuQh%TNN+-8FP~mq>SaN=SFtUOqnW
z^S$4(zkTdue}DFmy?+ohi?z7dy{<UV^E$_0=7T5(8X+1I5)uYXOjr&H30VpFee5wZ
z@SSfZ>>KdofsLG~AX3r5i%sCgLqh>60VJf-5b%u-2zdR(QcT4L2??|9_t%3?iyVC<
zB=#|wuz-T2=5CU|8uoNu@ji*&An)}~<KTj!+-%yoqT1|)eN|;;Wt3B>?6YUM0ys|-
zWgZzM8@yy0B%^rvob=)I#~EMrQm%b;M|UdBX5*=RZkjgS9K%1F7QV`Vxm~Cw2fG`*
zPnV&^L90{+Lxj_0Xvek~l%M(trpe@2YYX6@`3M#+sFp0<&qthQqttrvoji2K_n1j3
z-}{lF=0u+D5<i>CN9Q@R<&n9rb+&MOoYtvn`fz{n{(7&qwJW@g`u4l|?Jwus_5L4Y
z>Y7p93|bX4Ip!?932ukSgW&oVtnqv$3*Yxydyw9S^@kF&1gIOy&FWJI9wo`miKDZT
zm;D4zQkzSKk+yH~ldPMZk4<!97*s=XE~-iL?v52uE?(c+H|Vx)3PK?04T{oeH-qx0
ze=R^O7(x=9dz1$1r2Zs9bn2JUYyU8M2fav{cjqzfQS(uS>}RqRhMhouIm}4~&C09U
z(DY(2@y1V&jw3D3nQE@yrLtk&-U#3kW<A(#tTT0w<3S;DMRAvEY1AM)KU0z*36aEP
z+9?wOkDM|mLGL<?QC#uw5B27=QpDqwU*|3tiw53re6F7)Y`s3-@1zg@F>x^j$1yTr
zM{DN1yeM9bxw#eY-&$r8MQeV-*j=d5=y>U@qjeLuMQlm4V0wQ&Jm<l$xX#8Bn;nnr
zzZf;c?zHcxBJ;_-UVW*Vf33Ka<c8*gO|<OJo$}OUZ&IT?L>14T0Q!qwTY#^v3r_SQ
zX2|MXb#kMB(Ie-Mz2Ha>>bT~9?Lo{0Y*3IUi<i^Py>rEndy}?K<=3U0OJW_1gE)mK
z&FlJm_b+;t!C>YGkX4qF)Z#B70u*o=2%`TO+GVIMp!ERE{0O2ChITzw4jpWPHz7mx
z(V<-s<xsK`(iBgS8wlEkuN=xyLMj9-1O<GBrX2dFgj7viz_$hN`UrA@TSBU*El|}0
zNB0C>qW`ttju!Z5PY?kz_=rGxNT~(>%@Z_@3}$}#|Ih*s+Tk%<A&@+a^`7EKQRavA
z3kSkcN6JpTrH4PJ)0rBauL6dS%s_cW<5xS8iXO!xd=LLTkqhls-VFmQEGd<b>{wA%
zEfoXAVb6>Cdb?uM(hnqWqi%|@C&#oNqBTS_0$b|K1Zfy1B&{5;wvF+QGCO9PrY)PW
zJyFoN^)4^h7GC41fJDfLF*Mp%#g41~d1RlQ7;4zxl~75#Hnxzz`4)$owYF|$Fez+Y
z|I;?$Q{lbE)jD?hZX#!6LACnQ*9N_*r<5nEbwIG-D?f#(mjVy{_Z8@bZJA+urTnI$
zJaow6mpPe&OJ8d(=J27EqUM;`R#-X5g!h;Mx(Pxe+g{$L>loq^Fp0?VD&N3n?hVgm
z#&Meds+zB<%dAf-U3Q2V@0f)vs3e7V$NaLWqTe@4ktN6RZXccZ{j5Bh1j0v!9ejmb
zjP+{vxnijoMInXc#N>fAWT&v}`Fp=8Cfg-VI=5|Q^JhV5bc^ppgnFyx^(?0q2h0K)
zUiMVWa|{&Re{MY;YnlpLe?mJg?1n7SjBrAh;IP@I%1JVHlICsu6S^eOsd0XdF>c45
zyZ}`(u2~AIu@C9oPm7HvgXJ)J9AN^1T|%v!b)Pb~1*`mVD(}-9RM^5}7d6Q6x9r~9
zd>g>1`BcoecSo(b9@kl{r;$q9Y}GQx!MmEAk?A%NmugGg-@y3Jl2ahJR1&8eL+%mr
zi@4n?X%0G#{#Q!MS?*S!Kis~{wEQ|zNg)@$s9zkzGicxxeFp*3E4m-Pk@C`L?-gP4
z7Kt1CYJ62-fwWXxzyuWpN6pl`aUA96{FsiubIC%aL+;(R$G7=KBX>c)`9a^Ws(J%a
z9TC+&vaCXdZzi|cYqEBBqmR1s=2>wWDr<wr%ueF;9LxCS@nM7+uxQoS6|S@WRoeNp
zV)W_BzGRyy-R&*mOkf2Lqc-shf<&3_$`Jh+x^hL^g(r-sl1KG_vcB&~HPrjWE>d`i
z%VZ~^$MgkfWU9J)#YFSZE`!Wg_S2lA`)gro9;&LG`uAmcxxsRTaRucLa)wC-Vd#sm
zb~E2I$Mvy7QuMMiXDKK-B%HnLhDA?rOR*#?Dg>7EqA(*i#JoF;^OE%R`{U4-Wpp+1
zav3w`Otw<$RAz+q=#Jg+Xz;e@Sy`yYG=}AzQ(uS3SGV_Hv;E$=cDPpPhaR4C1(ZUw
z=rYuB&Lf#@p|`Bl)noA6pBm17HF6I7O_U$FhSIC5H@b^uk-@a{3Wj~7Tt8O1tjC2^
z;HlY1o|Jq_?sl%9^c~BJ2O_V<qAeRQB^6Gqeex9gQ&U?{VyV+GN1B}d3mGNwMaV3M
z;UW6|uzr3v2i*0Zq9JeTpb(?SAo=iL8i!7mjZ!B0;NqKjVKIi&ELZDYA!FqJgM5!k
zHJ~g5^)k+&na5Yyk#BY^olw?JIyAyuNm-gQm&4D0p%adH_i^%~l4hPKBQp|5i1|dn
z%+Kyte^kDkP-CCcr#3~7l{NaxPyd&~{7;9x&n}Ez-SDE)+JOcC8o#U{vhNrI-}kXU
zCh;cQI<m^bOhald5X)Gm*XM~bt?(Od0;pJcV8K<iq!5~<@gYsAtVAVWy`eC$PxBP<
z-0}-P*{C@vPb3X2GC0N3f}ZPCOHh<fEEr)dbu2t<SGV9xpr~JQUuVUlk5C(U6zL9&
zPX98sCI@ygm77I2ZWPE=Gq3c+_cLJg^?Sp%$WXep7HB6b_L;R->+tGF2e!UcKnUJ8
zX6Gac)g+;xeg&iIv)jyRM3ryNj8GucU=z`wcBEntww4j5-?lVzp{7g0t(Y3jGJ%Qg
z>$N6c-RUXS#K`gP(}@S^QSAl~N%F2W=NdBgf`o7|yhdz+#65s|EpV%hv5Q5oL6xU;
z`R_tvbYR{%RBGcC2ySZ=fpQI9%TZ+$KhR|>vvTNXVS)ZF_DEBfHu|P@!bLX+bcRgy
z$r%ko`9{C+#D259q4_8IQ>{T%z_aa1^KTNLpO4*Y921l%_a4SBH`lSS3x<Z>#7w+&
zR>K!~WLB-9ZuYkF1b29;tk9~`Pkt7jL)0$7ytpL1zt-`SY)uO{fAmC1ZcrlCK<#(B
zvCy_R-OscB>AG#$VCztKX8OY5VJ_zBL(@F0lGHg?MJ5}$?-XFZ1UEL8b7$wXadPZY
zCRi!r9TV7E|Kp6XvxB|aV%kH{W$Z+6KRWox%b-MC?6OKyXKYDW+F)ZIt2}i&7pjnH
zZLx246Ahx-=vdbr=xa($zC;}zq@neqW=~X(2hp)rokvRZl4K;8Go|o)ux-beX_?=6
zBCiEiwJ1vDek!3TbLN<q9a6JXd)jI?evR~}&o`7U)x8^>^~UKE=XoJuoJ686;IC7V
zWA~a<2+wAbmHia%?4FV{gGaM*!T6zx_q)w@zZ%0u8{4UTw`GF!iM8friA!+e`8d~`
z$~GW6RmzsuO{KD(-`g3G#DlIo`##pWEJuO${1;2KBV9UR4;V`i{lL;#mWdwDOX_O_
zU&5sVAq8*V7L3f3;O`GSO{`b&IC1WsRuvjpavWUq{i)wN74McgGkbQJ?6Pv)q2p9Y
z$C1^+a_{mtPU$rj7?IpT`8nRH;kUkzOvRrhKJlwCA`;}$P_*D7%lON-I!E2pI0<NQ
zcN{!X>xWItahVX-bLq^O)4f_!3en_2c4HUnUz^n%2K<`mu1FNcR$pvZ<t9Ln7fb}=
z$*zq_`sv1M>vu=9<yrL&{))P?2BsRa^ev(YdAe;=Nee6rvM}Ry3)D)eo7O=ggwiv~
zqi%6Wf$mz3nR{S(<jaWEWx)0(u}<xgsRV=AsNDDR+Mu9y8YLoWh9b8x5%5I95usE_
zlKgGrnRyjz?=_Jh&2<eFU!iKP=+|4=Ft^Dsl5O&Axr|ALeWX9wBYG09_FXuw+HQO$
z4GwYnlzG}Z+N7FWuCf*|_-6lGv^ft=Q{-so4q@>#EW^pOC_7Htt!dw6hDuW7V%Vnh
zoPKr}?VFlF)m=k#qe;{!4#MJc0nS_c9|C+?SwzLd)}}s=`)V(%G1N>nQ;=0l%=5lk
zP0o+PB>8&&HBMOtf=IIGR*48T&7wy?x;<A?z)9Uqx!l9zai_$|$k->^)NRk7&xU$|
zU>d7jXz&?<wDjgUYh@dyw2I<1L*dD}k0<8f0gojM`CMutJv>@e)mPm63R`<&8|Gkg
zYXhZd)zC+BL$2wPValekqOo$<WWkSH;~gZ%xPcJpu>LB2k&5VP1;NLw>qyc1#JpC2
zAE;y1MId55#YkSO(Fvw<P(>O(i#Y!qr~#X0dh?dVdoZt}()fLp26jM^Rh%*OD%naj
za)W5BCP6XT(OiKbBB678?Srbq2p@iQ?jk;P6)Gk{?=3{0lmHchAZTHMHF4b!HrFN;
zD-Azk21IR?y-kUn@{kqSlVq%rnNy#`U(pYbx0N8mJ|C*!)m>Jb>!K%Eo9L86!FiA8
zaz~h~e6U2-KL08q*J4Y%0d5b{cvE32T8yXstFARa8>?1!PUt~hjalfm95OqwbzJHB
z=izbaZOrBJ-EMrv3JHhGR=hQ~fm+><oYf0p^%J%M@|aI@3s_9=8e15S_0A*hK3VH^
zOHPMh#K!NNSAhZxE2l>;Y@+HRlPgLMY061ighsp8xtzZaHDsZiLEfr)jZ%*?Jr7Ss
zO@p{PbO`KH6~u$gqM6Z><_tG}nqZB`Td!;O%eV;MzEKWk0>GrN(muF}KXSHV0Z-jt
zyLE6JPX9RE-1C)zwS6QGk=$L><cI^xzi|hhR)Y=kpD_QzA_s+(k*y7-h6U5j`u|`X
z&=^p)Z=jI*_O|}Or*W}}5s_DUIG7BTsi~uG#aYGbOGcsfIViiO`^C@(DKR~-Q9C<1
z!*XkHU-|0M?)c&X|6FNjmHmu5_buu2Fcsrh%?U{$2CuOoBbl1#$Msd-OtE&ua8nd+
z`_3Nbp27-7X^z_M6`@g%H*(zXjWZj8#yh*=!QicbsgZc2V|E`z-s^ec;VgSq?FsTg
zZC=43Al~?FE}xJIZQA=fIkNaS4^zwmZL(h3MQ+^149(U7D5f~G_j{Rg=viBwf|=}g
zYLP=3!mK29dV$no%b6xxRc4ljj=hFxttgxwbxqJ<(or$f&a`IZS^;I08)ogit#4eP
zQDRV1&=w}UAmPq@E@g)yDZ4R(*?Ak^#EYj7)SOxjl;>?z5ubPj0!=8}tU@G-)|<@|
z%Sp|Us0I);^OUk%@^pkFXCJC^)ZIBMfrRdzA&zd{+%KkuwIm1vMdGw7Ev})%lj4}f
z%Lz-nb<y*?mf-E7wb?}B*-~c8sE735bi+qA)DId6>gF~!Xng*2sy{sWQmgU6XwWD@
z)kMJNzM|CP)mwRKGA2%;bA_$QxDNYHaiDONrJN;PXOHwaSNS@1_!?}{l@7P;c^cQ7
zo|#vgZF9YW1tU(EjJ5piS@V0urHvc!s=4!pg?8h^0P?hr3<5(wlOXQKBI>0al)jxP
z8e3GmUC9N<jp&Q(3{H&&{<`ikd!|b$BJ_g7rgWN`k+=!<KT+CV-PT(?ToE&`$Ugf{
zvD(EH=ksg$SnNk*mQ!hBahcHkuCF6b6mpEK)CgFUf0*5=wETMn=9pk$u(~1|_k4d(
zSgP&(`s-(<yn^8>I+@DdZaiFu0())(j9aoKJ-^5ZoC9xF<U9>TBY*6FqA_M_wpy};
zhlf+yMdQy$GS{B|&&!E`#jD22>sv;2^R>VYh=Zv!1DRJ=LYVKOK_cAetK~{XhZ|>M
zD!P{X!EoaKp9Za`0?6X-<hN5urvynEcPuu=askka05`lfkwP!{z;Nox!0~hzd;hPb
zSKBL{vI{8xPVoZ_N|%;<d#qb!L^po<sg$U`g^q>neT%jP`fZuE--MJ^sNB5I=TUMp
zg1V&P<QLs4CGVMC*+0_13C69ODSo@xlsE}I9g@o<=d@1v?0~=C9?|JU_et5p&W!uk
zd;id?P_=y*q<>c-N}-S&Zt-|E{?skPkOn={jL#T&5s6|h`+5S->O-F=RcJEy2-tld
z!#;^(M*(1Ne`QtTcOTJH`c|RJs!s9pta;7&k}VNLgj*Dd)sK0ue&l*Fi_0Lzuvc3D
zi3?nW_59^mCE9*$-P_nc)`f!j!PNVb|6&c~GLBTuY9=pC<?6`G(D6v(=m=GJMjy?t
z?yFkLf2AeMmiY9-RJK+ueYJTOcVZ{oZ7kbm2@m|7vddJuj&6(BxC(V{i}J?8PHrcI
zQamsR#jsU%^R?9XTW#wf#3%%%DqPIWhi{!0fZoA-ex&f&?>)69dT`(R*treIOasS1
zQTT~XEfn76OG;)C$=0lT@&L#n|0LNF1adDBzHzma5iCsk?QK9xt+u;a9bvS7@2%Cq
z87^9Pu!78a$cAZ7<Zs4tI>HXyZ<riIsXM8)-X`2Xc{MVXtB+y8S!j@sFgrN8!NRc#
z-CZGxle!&c8Pu`~UC80j9IU)Up7{b)PWRE4j;A{2ZC~t+e7QN_Z<u6$u(`JtEQ+fe
zrmT41;}hL#xV7g$b=}e4y@>Ts^pwXlI5NYM7C9}8JI)Ngc0MKPwpIzf5e}aAkaZ{3
z6!3rr;4}cWQ;Z9zs;X}>zm{qayFG`6ZDhn^uy<l~<g&EFNau5du3<&w4_MIH^0t`&
zWP*J{o3P73Zw^f-pQ=(tWPPD8ySCD|jSRes=-sgJM!dJ!?syxUB^&T>Ri4}LS^VZF
z^6O}5759Q%?(2oP{t>78OsbZq$3CFZQ|)@$x}X2v)fkY{Q^Z2Wh-RGej(O#7$Q)kV
z;k4@OI_G@~r}T<q&EZALeNzBLHY<4Sgt*^NcmAstkwPzwQ)9)hYi0LL<U@Y&x=vas
z+&)Ul2I-lct#uW5T_<om_o&qcCe)#!DR8WqU?us0_-OzIt(+WMvzvGU5aY%E4=bPZ
z>=#8Yvo0rJZ~kyT2w$-c=qRThKW5VyvoZU!5!J#ZB*L#b`JxWNX(c5k<X)4t@Dz%W
z9ZN~Rnjafk<Q&{3VpKjDE$LW1?lDuTrzrnkcVbAqm@qg5Hw<j9p=l!BHVvIJp?Kxs
zc6C#Y^M^z&H-litVGbCANiKWs+tVA#37lxEJ3w0L*E8slquC6UZj60+o8W?Lvv@Ji
zb%^JQJhE^wr5@Nb&ih(w*Lil;!OGgCAco6uUDN7VhE~=gqzz8*4g5>b%mmY*+9a=Z
zbOB+b%PN5B2xKPQO0YZIU9<iz58g9~oxL)17!&gyM3~TZKhqL*GM`Hoo<h8kwF}Z>
zDv_Z8wWd!9G}?tHn}>vk9=z{Jsi)CeWy8FQEtqx@XnG@jQPaJUMNlhmz#EzR)?S2a
zqMn$dykrS&nWbXsGW(jx`4u30TzB-f$=?p-x|hqV<cMc}`!#-y{WmeWsa{Hx=y_Bt
zfv`c%yg!oP2M|0^##+N_zgg3tyBw~z1NvH0V+0ol3ME(B(yt#jY38g@`DQ*bvCYuW
z;xiP_-1+Y%B)5?tc7q^sR_G9QGFM+n!;G!?o1r=WiI17}_hR<73NC6JPxE()bIm;O
z+Ecineg7jd-80kx;*Poz*|P~)5|F&l9MJ3aG66pCe>pGD!UVIPqgkG~aQOTfQk5qf
zF#D*M1GyUx>Oa#vwh%Bwdv=*=Pxx6rE^5N;S@K}fvl^aHBBf;v_{vvnmFuHU0f^^j
z@BOKHMWgXGOT9j4msW54QThkb+yqRDD(soO=H0V57H1>yq|$QkZz24fP(O3%bS0*O
z^=-?=cG@*YkT+fnR&5%kzp5=U{IvJcae@h=PC`kl5?#duAGOnjAo$1#u8KT23tkaH
zYnWB0A?S3AXEM>L71gTmD^|I33;E7An*cr2zys|6y69|adgau;ohV@3xPwfk@eNas
zZTTd6!Czp_9m(_-Wcxvj<V2KT{?t$98DurpO)%_(IbnVb*Uy*nx_b$85lpm%=5hC$
z&j<UNmv#NEcC5;8FW4$$Ky=hE>(fV+smorO@ua_P)++%B1+CO1sUJuQEoGTL9nS;{
z%{d=ksI1~lMo#-(H?_E@eygewCiFt(0oWaBktT0%@??zzQ|4=0<j=}6zXDRQ^N40D
z&F;s?zTa6+0j;U;b`(A!EAC!l>*7tB*_B@XVS#pUc`sPSM8JA=!m_lFlX@(ugYWgo
zT6@~V%#u;wul0J0=qYI+6bTL`+l4piy{~xoLD8;Gm7Ag}T3*w+J<s2}UGa$M{Fcp0
zT5<szjVanVS4;JIxxN^`6nQTgCi6*A8Rm|Grj+qLbL(slr;c7#Trq<*XNyoNw$s?S
z+(cOC>}K^U?P0qwX<7`Z)&d;pp>Hl90%#$GQANQ3CB*dm@mg_87uW@4U?qbPkFYuG
zs@nV<j{=F|#n0BSxQV|rn|;zB-zyhMxnh_79Rf?JNMOdY`*e7P(inFafEHa=%fe@j
zt6iVb0tDo(d6_)VlYPyg-Fi;0Y4gHnZHEGAeHGJD(Q*R*=86IjIThu1n*QXwkc3@N
z<Kz?<s;F=_yldCjfb_;E1b&{jHVbeDj`)-cTRiN`0EEQpqRZ(e>p>UXR>hfg;rJBt
zBaTS5t|arm4yf<HJoq$j<ouYBL1WhBu>RX7s!8je027Y}SBY37x6n}T6!8hmHjkRD
z755*eYTg^O9FXkHi1w_f>-$_*1-9T3bAHx)ABwr6j0_={JAf7q3$LwTUNe6^6-d@1
z&+IVU_%U{Glx{KzA|Q_Zt(L8JZWD6r+s5Y55HoLCGQ*^HS;<5ogG$d)AG1FMZ>HWv
zrt`8iM^B+<5q7_Z*1!Rc?$}8+lphfHZJRP!^pg56SH=_Ym=^o^JmzyOHM-b`KNilh
zLQX=?`5F0Gv4RJF2MzkU9b!y7sQ`j;IX|}7NIGcx0zb)7plw65f&En4XKo@w1;9sC
zzHj2sE_*qEMl74sc8oWc@&(sSfSVk^I*{?l)!V<mDg^k3qd}#_V>*}xl!(R*3q3lk
zOPS-0?>H9rexaD#<uPDiN}&KyWvowv`)NkRAk&7!?zbcF=iK_sD!ysMT-@9hIfe%+
z;$c3Y#jP349Qp<t*D*uIIK;8P1ElNESm#2wb-uK$ew;mRfH-slChG-X+Ed;vGBW;U
z=B9Livev+OL~sgJ-;8oYt69<{9}b_dAE=G%9%WfXIcw6TqwCo9{orSo?*bHHgrk7a
zSttD~A0gcDWO6&p4+kr>L}7fbw|+0^XW%#mHbjr&qbLC2ZhSscl+h;8QTK6V`$bBi
zoAwQ}g0M?$AIDOno5JM%EiNuEuu=6LDg4G&qg0PIJiglQ1rNvu>;pjG)0jKMtW1OF
zx!vTuq)oBPJPp=muWUE7_^`w)_d0Ga_mA@kON`*Yf4@V4@QI()^{wo<PLnNeXaS@e
zyUjVT&!smwFkjTCb33cR;xfcpB_ZEx^isX88ixdzDXx;k9>&E^vc0)wuB_RZJqGhH
zifqU*Yvns5G+4y5t&0xj%hDOdT$%)5Ben>!>I=2_@58ADlwJb7i8!MiQ6v<Dqc2|f
z@XeW2*c31X>4pOx#`YV0#FkQwJIi)lcPjyHU`ST3S!IOhExQ9<rz9S^=?%#Cg4Xn9
zV*&YY6!-;AalY}L-2=Gy9Ala}4n$qx&sgm{9@soE^an5NXl=2|W=}yy_|%zJ<R~n3
zppbZGn6Uex7RoDv)&o%@afqqF(gZqevg0d)qA1Li4-=uBn>*?>c2zlVbIJKSC6kOf
zlT0>Qfj}Pr>IVy5j=M@4Zk}UqiN`f-1z;Ba<$N*`&f36<HN8gCP9rIW%WiO(tZl~p
z2YW<PA2ISCeR4NEZ_mH}W7R&RW7Bk?{oUFeWA75HMwv_(h1HC&VK8+br2GQF6WsRJ
zqnsLRJ6}&+BZFGz-_T?J2|h<#hd!l^x91-88_m>0y7&@wN3LuKzNE{ITTRY!$M0pa
zlJvLrKa^=0`*|tg*-eT~hf#{gdHGtPLq-UqKTOXg!+e}>V8<;*mkCB<E-(<}<D~Zh
zw+I>V0CfVH_Aot26e~baX72IIq>?Fglb#dJMOJO%n_=P(`#j$5PN3qoEfsX(sU13!
z`nJIr<DeEAtXJ(8|D4jH99@7Ly(UxMLHezE6##ee{$8+ts|fp}z`XW0oNHYYe3%{(
zj%XxO;!4gc7RJ|0d-%roW+X|pn*}o*Z;wYY3MY9}Y|W_*>`$dfjh$y}eTu)SZZoB_
z)KnS5%fLwmcswiynQEb43c{j@kGz7RgIzkdl>#wzI72pDsLrS<vb2j&p{~`S5Di&_
z$uq2wen6D`oXD?fddu^xWmrKlDWQxsX4qK6P_6<<Ib}=G-?Lp32C)qlZU(tL3h;=N
zrJA=l!e}Rf+|wZP)I9KM#6tYXBKzI1c`mMtH{fguzX(pIwOE7qgBxG*7{uI~&`%S4
zU@0X_B)a`K&*<<tjqW1`Yj{<Fsh7jRj7B*Q8eNC%&w2(i)I-;*ZZ3AEId(Ct(BNmA
zC3397kIdvlx+L{tj{C-H_%#J;Q?h&j!2M@ne6YS33qCTHhT1XH2pGQOW>_fRoMrJy
z0VloKA3p)cl9?T)K#?Z$@&U944C|P7zS|n(<y*=tqA&wxd`26&hMXwwS{KanS7z!w
z7-XiJZgWzG8||me1|n*f_aY)DR)gOeqj+%F55FBP%$Fup2wJDpe>1->2cRCR^mR>r
z+=5wa5LvRcus;7T%c;~8Zc*b8BU^<dn%tJa=*iZ|wlQK%EG-32O3cU12(6L(GdTBQ
zg4~=nK>0e=N7k2W)XaEngz9TfKIgGFHgHrT3{7hs3!9f_m8aW9KaC)?@}gaw%m4(z
zsZq^&qocteL$TQ>0o02yIkES(r!sI|E7getBXD?k(W(Q}-bjJ?b~ojqS>lV0GW6$d
zu>;(&`lR|<pV?WC0GAw}>s@%iPC7}kDKmY6C?owO$eEAW;~-qr8=&;IP(Ul$q^le)
z4Xm|*8kNdZ++qxlh%T~p@UqH!C|imE@b~wapG51~?Puj-h$}}L!4+g&th}ev?QTt`
zIFlav-$(VUELGZynNkG~{CV5wCR#wT`8QucN+yWz((Ey0qB{`~T)@-Rz}b)g)7dut
zZ~!0!!nnW1hDEeW+J8PhAH<LK|BVO#*LMJ4#d5y;ruhZk)$C!<cv}h<|1_@p%^Qeh
z!{k{t1($8nc|3vT&E~scE#2Kt<pXQa`=-@qcaMGkmSQf~YYRV%n{!^}P!Qk}IjjZE
zW3y0U)M4Y%pC{2TlBhH~U+k%?h*`UN<y^1jbAYc`LL%GPqLecEa6Z;CrGGd5^jdm+
zp(K18%ZD&RPbcQKmHE`PY&$||pM*2U=IKrRfgfu6OXB=+zL#<Ms#6Ak`BpB!4KiHZ
zwA1Ii737U8E9YyNu?8@lEq8NR@KNUW^)<4piHZ~1Y1+UuyX;UhezJh;cd#ZdPK>fY
zD$+CMMR`__=0K}49QqqC46xeZO~3sxeAT3AK3AX7ASW1qxm{#w$1HH6zli>_x}?kG
zEWT16;`qzw0vM^9KbE9gd;wj4vtYP59^~iuI5g4UAwbghVLrbZUon)`7Fa|AEH8_y
z2W!2PjVOC3o#aR@Xzf!!o$qv)S&IKTd1{^`Jf2?FgV}I2ZiQ(u5*bMmhiY4TU9)yE
zZTsc=2<e{%{8R(m+hepN*zS!z1{U3O?m{9ek-p&mSd<<Eo{G7$ct(W{66A#H&jZjK
zRl9S|S!#ASIa7Ux^kw7bJZ_@-1tWU%@I&wwVBi6)J%9^MITWz#0Ir?~NH0oAe>;m%
zz{p6P+5(Dy-Qz<f%NBS6aEIv7$4E<GKmb_+96V2vS{{JQkbj$ZNRhsvK=c7e5MUfa
zLPCXh0cIfJ!YQZ#67$23oCHGwxC+df`*p~jU$_lkXe7?%Z!niJzI$pn87rrMSf6{U
z`tSnjKhD!{8k%(uTS)q7Jpba=6}LF~SUos?mp{{}!I_bwA}l0fNA9OGP{|2B_A|Ao
zJ^x<O!7&o#Aqm!hT&9Hd!tq}>p`KO%e!5dn%VbV8b|$%15Yba~NF#+ZlkA@fff_pi
zk{eEzRij;AxdZto>^%9HnXsPy-GN48Ly3WmY24Usmcl&t<OZIP!B)BHHN_r&d?aI#
z0X)m?6)|5_I++WD1{<nbi$A4Z!lx7S%0dy|k!c>4ndQ_|Kw+fhEwwcgHU6Z^)Q@em
zSi>bLEEN4)Hasv&&y(HT+By6zRR8JZJIc@K*Ro?86sO&^`)jPVe{omQ`_MkL?O?I)
zm6-?Ne{RJ;lng+N`-<m4bLs^J0{{h>FQ6UQm|aZEfx|mg$0-0AznZ=PQRiG6@m5rG
z+Wx~)%`oFcJ-v?*;G<xnH)C7Txld3n!-EAP8>skE<d3|M$Jv_0K-=(iYzL57u~{nQ
zXte9XCeW=;jx|zNC#cTwVk?pJ%(L{vI^qe;u3Fp$mQ%rc)f9$PW7Mja$;+B;*apl!
z4nYjbLB=2J&pLZ4%Fs`lX>RL{UX`6zJ$@pUzMa${J6FytxKoMIQvI)hs(G$LLisi^
z6@hbsn7;dIcdF{qIzYQA-~IZDaV`j>D)*Yr4d=QE9XIST)uZzuUGU~Hz|LleB;#7F
zxK)Joa(%wpt;AnBd-~`SwD+{I60^N*K%_1Y9CBIH@Se^*3IUDUWneQ&y2%65R^)Du
zfkQz7jB6yvQuZ!`FA~p-#dddQ_&ekpn8yOsQUUhz5%JsHK|tk3t#q@W+yQh^-T_nm
z*HhGhrNDUL=j7Ol1%j-zD3ASNGgUY;3G&|=uq5uCh?8tw64KYP5nJue)G&1sd=Bc4
zPa|;lG>;^w*rXw=?p;o<Ph4ydS|cT*T6eHB5|u||m;=Y^S1#Gke=%jxZ4tDdaS?C_
zOc*a}3lORAO)0_L^EM${S6ChNIsAn&V+MA83jV$sdxSLuG~r|YdCvmU_~(ZhRYMW=
zd}8m2oM>A|JAt`@*;Lm>;1{(dRvTUS>Ir76=8h^BaqH!@T-CRd<Ug*zrXc+*-Id5A
zZ=N65iBhM~tTM#zV5uC)eTZ?==DupO`WbF}stESg|K%&XQD%B=r0TD;)1J@qqr6sW
zGTC<jYh=SX{I;!}Nvp}}^lBrfcmaBFh0!j+1eRk(+-$@<zFF)Xbuu|K&{m~sR}}vZ
zMXZmfJRP}wh5^LBLNOXob?@2&kjp=HM~NIKcEEt(k?1-fCm1t$K$F^QU^e(?by?~>
zn@i&mK=-#S;YYRszN8YvH$?Eoa1fvqx;#o*W5e{Go3Kjar8LFVlp9J6g!EawsJW_{
z<z^LPiMRwb8^FmTO7m95Qa;DXp<o9HlRLW@>%Jf~rCRN;zD(vc+W%B5`e)2ThxsNz
zXbA+~`kB58um!+Wig@Du{Y}#nFq~#lb><eC<#;PU#|}u@jlhgSA~rTrIGN)7S3!iX
z*X({)^uyZw^tTyvGuw{u(^a=5F!$VAGk*(ZQ+PBn2_44yU6B$zHc-{jbWO!fv!m(W
zFRUSFfOwk~M3Ca%$~%v<a!Ai5r}L6yD(mIj-3&-^F4Di{e8DLmAjvW8TZ*CYeTVQ&
z2bM+3Y*bBUv(USD!dJ_8pM{6B`zh~J1HolCd@y3)IZdSM{BGjS6m_5)ss+w@=mKp(
z*hr0wa<n<pp((iNaC-`$T#{ig7lO6Hfgv-27=k4ZvJ=<mrQZcY5M;oNqr3Qo6sU!_
z@qGR|eY}^6<x7BhuO|se7(<(4U~to0`>El@mGQqCf~Ak3D&ULDd5)pBGbl#0wRiZ-
z<$c-A+FTKnknk+|k4$1raccz0mgFOD8zHrky_z#bf;Dc?JV|lRQ}kiw0QI^B7-2n&
zIAER=dDUOE4Qv^$;u$($ei%AnGAOu>LVgmzYFp;JLTGHU4;t)ziZ`1pV*WBarzdSU
zE;U+;j2ta+(_lh;d8l193m61R$M1GD(QUosW86Maz7!6Rcga5j<f(a+*<Y*R8Kmc2
zfL8y{+Sdf*{K3i(GkL9XdDjGqjJ;eM98Ia(JKHlYh$R9c3wY2n8Rb=oY>LBNV(r9Y
z1anN0kC$prQi5lKhgIXrmvzLrlNl0kR&(I-XTS~-YDQ?;zwm08D#Iq|3*b2WyQc<g
zK`%n;^`gTX@m8tKf<H)$v4xU0MkBxfS2=vld7&o|P)Jjh8&s8>9lk8z?Z|a9`cI!-
zQr=#)V*lupkKmv!wAtKv%+G6z@(`7YPJHIkApdJOY>HD=w5fmo{J(C?|NVY{m;kw%
zbes0LZ91{wSMb96$s`&$d4Cb>141d9xZQmB8;%^QQaF0t?GF7E8ph?T(3Vs^Zr*db
z*zfFVRD6iE#M4QCZ+D+j68XpiyodJcg1x|1+L7wwbrS{yk9%5rPLa)L>*(J`^PuUl
zNQMjQnl4kjC9F~&1m~8bUP6O|PPM!G=}E`}W8}bnOzy#NNVD(#(G^=gHlCjOgtPX3
z7!2vlSM&-&G{6>FmfY`FaH}QU<N(xX+qzOoe(<0|%;iN<uFw3H6&n|CHXD{xKNga*
z0PV?H`;Rj1)|g^VuaMR8d=86+KGe^P<AeP7H&^{c#kihWOQ+i$6)br6+nu;lLJ@yX
z8*;Kc^e*{ho=;QMX@vvsdLPwB5cs#x-sBVl{R+72bH>$505mC>rfBiM`~xr~F*Y6r
z_-KG43X^8j+1=Pp5;-04vV`!pnrL#fWB(>_Zh}Y8bx*OQ+B*W^$ibyt-DUR8s;Hn)
z$Z?9h{EF5&|JAwPng{<S4siJ5^JUtVG^+LDQLp$#lm_rl3hzas6Yw)14?u26En6VS
zL*V+(zcC+Df#z@A_P;$uav+kb?eGoyR-WX#McCV5>%6lU@blDW0;EnW2^%$gTX&DB
z7PA!V8(<^=ESrHWKqEtMEX3*_0;c0oc5@6o4-b(wk8&HEoUh4yUn2n_^+|o<B7{r@
zkUK6NI(yRh2z58IGf@rYE5~X&JajmbmK=Z;UMNpIa>R*M*Dl2v{3h9eZ_UqfDz#Wx
zwfil+C{Af<z{q%2Bcqj@?d_Rs7q6&CZi3i;a81U&wWfvehufAfHuf!S36n$8LPn%)
zca~Bbz})yu@<qd{?9W_%sZ2{TJp%qPM3(0@V-H}E0eX<p2Y3gXT?Xn3F43Ki7E;ST
zG8p-wR0a{~Vq`DfKx;yb@D}xFSW?W+bGezq#WnZ=m<s?{m2IdMRe>QFo*{D~^^Ntl
z)Fj($hBq}pT3Sbhf?yF8*n@Tx-4?nAtf7RBP%(STOS30<!zew$mqGTuOXY!F>p)Rp
zE!4_m2P|O|W#{m33D`&nfRz@>6^dx|o-4|Yi`g`2q(rdY5d(HCK=|YEbGF5GR$I(_
z`HW}|kQ8fIMW?NRrlgzL$Ei4^OXDd^p;98nlD_x5qx5jUSnP0?TsLUlFV5NfIBWDc
zv*jCeeyYt0VCE{$pxj=Mg5_tNwLR$xYVCp}H826Fo}@SHsjQ{1`5g%6Feij<Y;5(6
zfU&Yh)FP?j<BUX^`e&N6cDgP70RUyn5%W@kC%SzBmluK;uw$r4>zLL|^}+!i7nXAp
zS@sF&w=V&4aY^GH65k``r(Z&R-U>e(I=(`<)v2%veg}(B?tY7w6P~rvJS(YMG)mx(
z$fHtWB(5Y=RtBV_OD0MoQR!}Y<;Zd*Ihc3XVF0HJGg(qjKGiiJ1dN4%@qTu=j%x3U
zH_{g@fCaR06kt5nS5&R!{k`w?kFv0j>+MA(&fB}oQ_f7G*w>7A*1fc-DkTUr858{a
zP_y*xL=d2F0Wl~(^MZ10Ec_+&iW&nDa%poguIG@4OB6sH9uN=-d8@Ux<2<Cx43cgJ
z8rXF<k!lZo{cdw;_NrfJL8T<eu0&<+sD2tIjmJ>K_^yOPE^qH8;6e^bcm(8FED%Xc
zdSc$dfNvr#&SktR0=AVv)rhkbj#gJK;<yK2R{l9@b(0q#sYq|*jz^On4SeiGFCa?k
zxSr|}M{S8X>xn6N#0#zUsWCHDKI9xo4Se9Te9`lzBTMKSs~RXVXH`kqoqVq`YBvBm
zNWb_i)JtqXny?dj)K={~FZqe<4?e{+L^mTxNElu1IXFf&bjn3Qb7J|I!$9nHw!2wt
zhJR0_AXp_-aAUbwJRqvVR;hxOQv=U#uw~vB4apHOYy$u8_AnrlT%x=uDs~aqZP2l?
zMQ&zUMva>G88Dp%IF>ZS=H^Zu)Z77JJ~DoQ&G^K6aN|WX>+G$$NiD1aDrWT>5SAl=
zVe+Xd_@%hajipr5?CaF+q(0LZHIYA6_WQ$MKHn%DdD$R|)^ZJS(Sy>0!*kdBxYW`4
z{lv8<VqZbcck$+jE;?1-{%z*lJT5fGxv1xf^K9F-Zq(~|8uN_R5Z2j@eFBJ@(PrVu
z0$>qhUTnHll9Hw|?Ezs9js_-YSBwCofW2O$$Fm2LjeRhIQ1m*^CrC^4K*C*o0TlJZ
zWnFQ1!0mq$qfo&oQ*seZ%&Sa7iFiLK7yP)pLwi~EUdy(UPPl?gq2i=>&}cL3>2lTM
zH~oG7yMgao*Iy5>$nWLrLln9BH=<uZTcCcpg!KR*)kw;XzZo}@;_v)I`Z5j%C^eGy
zDG(R`{X;idp!?mWpZ6D~!I0lgB!&L|RQ@;x3$LLaeqVMz&`jJ%BLrL@IDlyJn08@e
ztzDRf>vY>Ka}dHpfcIMrC6%q+tQw03-wgcjG|cnBn?UpV<?wB=uW|L{@6U(*AGEl_
e)8_l@`v-ic^x<{kHoyB05=`WSaFL)k{C@zrR29qs

literal 0
HcmV?d00001

diff --git a/doc/DHCPv6_Relay/init.svg b/doc/DHCPv6_Relay/init.svg
new file mode 100644
index 0000000000..cc4baf2c92
--- /dev/null
+++ b/doc/DHCPv6_Relay/init.svg
@@ -0,0 +1,3 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" width="502px" height="162px" viewBox="-0.5 -0.5 502 162" content="&lt;mxfile host=&quot;app.diagrams.net&quot; modified=&quot;2021-03-04T11:30:01.019Z&quot; agent=&quot;5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.190 Safari/537.36&quot; etag=&quot;UPtw1Ap8kw2QfDpx_7Lz&quot; version=&quot;14.2.6&quot; type=&quot;device&quot;&gt;&lt;diagram id=&quot;kgpKYQtTHZ0yAKxKKP6v&quot; name=&quot;Page-1&quot;&gt;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&lt;/diagram&gt;&lt;/mxfile&gt;" style="background-color: rgb(255, 255, 255);"><defs/><g><rect x="0" y="0" width="100" height="40" fill="#007fff" stroke="#000000" pointer-events="all"/><path d="M 50 40 L 50 160" fill="none" stroke="#000000" stroke-miterlimit="10" stroke-dasharray="3 3" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 98px; height: 1px; padding-top: 20px; margin-left: 1px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: #FFFFFF; line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; ">dhcp_relay<br />Docker</div></div></div></foreignObject><text x="50" y="24" fill="#FFFFFF" font-family="Helvetica" font-size="12px" text-anchor="middle">dhcp_relay...</text></switch></g><rect x="160" y="0" width="100" height="40" fill="#007fff" stroke="#000000" pointer-events="all"/><path d="M 210 40 L 210 160" fill="none" stroke="#000000" stroke-miterlimit="10" stroke-dasharray="3 3" pointer-events="all"/><g fill="#FFFFFF" font-family="Helvetica" text-anchor="middle" font-size="12px"><text x="209.5" y="24.5">supervisord</text></g><rect x="205" y="54" width="10" height="69" fill="#00cc00" stroke="#000000" pointer-events="all"/><rect x="321" y="0" width="100" height="40" fill="#007fff" stroke="#000000" pointer-events="all"/><path d="M 371 40 L 371 160" fill="none" stroke="#000000" stroke-miterlimit="10" stroke-dasharray="3 3" pointer-events="all"/><g fill="#FFFFFF" font-family="Helvetica" text-anchor="middle" font-size="12px"><text x="370.5" y="24.5">dhcrelay</text></g><rect x="366" y="81" width="10" height="60" fill="#00cc00" stroke="#000000" pointer-events="all"/><path d="M 376.24 87.78 Q 410 88 445 99 Q 480 110 383.16 130.61" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 378.02 131.71 L 384.14 126.83 L 383.16 130.61 L 385.6 133.67 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><rect x="45" y="54" width="10" height="30" fill="#00cc00" stroke="#000000" pointer-events="all"/><rect x="80" y="50" width="90" height="20" fill="none" stroke="none" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 88px; height: 1px; padding-top: 60px; margin-left: 81px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; "><font style="font-size: 10px">Container started</font></div></div></div></foreignObject><text x="125" y="64" fill="#000000" font-family="Helvetica" font-size="12px" text-anchor="middle">Container start...</text></switch></g><path d="M 56.33 69.09 L 197.63 69" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 202.88 69 L 195.88 72.5 L 197.63 69 L 195.88 65.5 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><path d="M 215 91.26 L 358.84 91.26" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 364.09 91.26 L 357.09 94.76 L 358.84 91.26 L 357.09 87.76 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><rect x="380" y="64" width="120" height="31" fill="none" stroke="none" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 80px; margin-left: 381px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; "><span style="font-size: 10px">Listen to packets and</span><br /><div><span style="font-size: 10px">forward</span></div></div></div></div></foreignObject><text x="440" y="83" fill="#000000" font-family="Helvetica" font-size="12px" text-anchor="middle">Listen to packets an...</text></switch></g><rect x="240" y="64" width="90" height="20" fill="none" stroke="none" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 88px; height: 1px; padding-top: 74px; margin-left: 241px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; "><font style="font-size: 10px">Starting dhcrelay instances by VLAN</font></div></div></div></foreignObject><text x="285" y="78" fill="#000000" font-family="Helvetica" font-size="12px" text-anchor="middle">Starting dhcrel...</text></switch></g></g><switch><g requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"/><a transform="translate(0,-5)" xlink:href="https://www.diagrams.net/doc/faq/svg-export-text-problems" target="_blank"><text text-anchor="middle" font-size="10px" x="50%" y="100%">Viewer does not support full SVG 1.1</text></a></switch></svg>
\ No newline at end of file