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cmooney
Mar 4 2026, 9:08 AM
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# CR VRRP packets are not reaching the other CR, as the two Spines are not sending EVPN routes / L2 traffic to each other:
cmooney@re0.cr1-eqiad> show vrrp summary | match et-1/0/5
et-1/0/5.1003 up 3 master Active lcl 208.80.154.66
et-1/0/5.1003 up 3 master Active lcl 2620:0:861:3:fe00::1
et-1/0/5.1004 up 4 master Active lcl 208.80.155.98
et-1/0/5.1004 up 4 master Active lcl 2620:0:861:4:fe00::1
et-1/0/5.1019 up 19 master Active lcl 10.64.32.2
et-1/0/5.1019 up 19 master Active lcl 2620:0:861:103:fe00::1
et-1/0/5.1020 up 20 master Active lcl 10.64.48.2
et-1/0/5.1020 up 20 master Active lcl 2620:0:861:107:fe00::1
et-1/0/5.1022 up 22 master Active lcl 10.64.36.2
et-1/0/5.1022 up 22 master Active lcl 2620:0:861:106:fe00::1
et-1/0/5.1023 up 23 master Active lcl 10.64.53.2
et-1/0/5.1023 up 23 master Active lcl 2620:0:861:108:fe00::1
cmooney@re0.cr2-eqiad> show vrrp summary | match et-1/0/5
et-1/0/5.1003 up 3 master Active lcl 208.80.154.67
et-1/0/5.1003 up 3 master Active lcl 2620:0:861:3:fe00::2
et-1/0/5.1004 up 4 master Active lcl 208.80.155.99
et-1/0/5.1004 up 4 master Active lcl 2620:0:861:4:fe00::2
et-1/0/5.1019 up 19 master Active lcl 10.64.32.3
et-1/0/5.1019 up 19 master Active lcl 2620:0:861:103:fe00::2
et-1/0/5.1020 up 20 master Active lcl 10.64.48.3
et-1/0/5.1020 up 20 master Active lcl 2620:0:861:107:fe00::3
et-1/0/5.1022 up 22 master Active lcl 10.64.36.3
et-1/0/5.1022 up 22 master Active lcl 2620:0:861:106:fe00::2
et-1/0/5.1023 up 23 master Active lcl 10.64.53.3
et-1/0/5.1023 up 23 master Active lcl 2620:0:861:108:fe00::2
# The Spines actually don't care about this though, each of them learns the VRRP virtual MAC on it's directly connected CR port. Because they are not learning the remote one over BGP they don't complain about a duplicate MAC:
A:ssw1-d1-eqiad# show network-instance * bridge-table mac-table mac 00:00:5E:00:01:14
-------------------------------------------------------------------------------------------
Mac-table of network instance vlan-1020
-------------------------------------------------------------------------------------------
Mac : 00:00:5E:00:01:14
Destination : ethernet-1/32.1020
Dest Index : 36
Type : learnt
Programming Status : Success
Aging : 1120
Last Update : 2026-03-04T08:49:32.000Z
Duplicate Detect time : N/A
Hold down time remaining: N/A
-------------------------------------------------------------------------------------------
A:ssw1-d8-eqiad# show network-instance * bridge-table mac-table mac 00:00:5E:00:01:14
-------------------------------------------------------------------------------------------
Mac-table of network instance vlan-1020
-------------------------------------------------------------------------------------------
Mac : 00:00:5E:00:01:14
Destination : ethernet-1/32.1020
Dest Index : 34
Type : learnt
Programming Status : Success
Aging : 1196
Last Update : 2026-03-04T08:41:29.000Z
Duplicate Detect time : N/A
Hold down time remaining: N/A
-------------------------------------------------------------------------------------------
# The Leaf switch duely learns the MAC from both Spine switches,
A:lsw1-d3-eqiad# show network-instance default protocols bgp routes evpn route-type 2 mac-address 00:00:5E:00:01:14 summary
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Show report for the BGP route table of network-instance "default"
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Status codes: u=used, *=valid, >=best, x=stale, b=backup
Origin codes: i=IGP, e=EGP, ?=incomplete
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
BGP Router ID: 10.64.128.27 AS: 64814 Local AS: 64814
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Type 2 MAC-IP Advertisement Routes
+-------+-----------------+--------+------------------+------------+--------------+--------------+---------+-------------------------------+--------------+
| Statu | Route- | Tag-ID | MAC-address | IP-address | neighbor | Next-Hop | Label | ESI | MAC Mobility |
| s | distinguisher | | | | | | | | |
+=======+=================+========+==================+============+==============+==============+=========+===============================+==============+
| u*> | 10.64.128.17:10 | 0 | 00:00:5E:00:01:1 | 0.0.0.0 | 10.64.128.17 | 10.64.128.17 | 2001020 | 00:00:00:00:00:00:00:00:00:00 | - |
| | 20 | | 4 | | | | | | |
| u*> | 10.64.128.18:10 | 0 | 00:00:5E:00:01:1 | 0.0.0.0 | 10.64.128.18 | 10.64.128.18 | 2001020 | 00:00:00:00:00:00:00:00:00:00 | Seq:7 |
| | 20 | | 4 | | | | | | |
+-------+-----------------+--------+------------------+------------+--------------+--------------+---------+-------------------------------+--------------+
# In fact the Leaf is going to ECMP between these two, so it turns the normal VRRP active/passive traffic path into an active/active one.

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