[EVPN] Static MAC propagated via EVPN as dynamic

[Hedgehog-Guru]

Description

Static MAC propagated via EVPN without BGP MAC Mobility extended community, thus shown as dynamic on remote VTEP

Steps to reproduce the issue:

Two switches with any link connected them

1. Both switches configured for EVPN: VTEP, NVO, BGP, etc
2. Single vlan and vlan to VNI map
3. Add static MAC to SW1

swss-container# cat > static-add.json <<EOF
[
{
"FDB_TABLE:Vlan11:00-01-00-AA-AA-AA": {
"port": "Ethernet64",
"type": "static"
},
"OP": "SET"
}
]
EOF
swss-container# swssconfig static-add.json

4. Check MAC added locally as static: fdbshow
5. Check that MAC on remote VTEP: show vxlan remotemac 1.1.1.1
6. Check communities for that MAC NLRI inside FRR: show bgp l2vpn evpn

Describe the results you received:

type = dynamic

Describe the results you expected:

type = static

Output of show version:

SONiC Software Version: SONiC.202205_rc.17-12870dde8_Internal
Distribution: Debian 11.5
Kernel: 5.10.0-12-2-amd64
Build commit: 12870dde8
Build date: Tue Oct  4 09:54:37 UTC 2022
Built by: sw-r2d2-bot@r-build-sonic-ci03-242

Platform: x86_64-mlnx_msn3700-r0
HwSKU: ACS-MSN3700
ASIC: mellanox
ASIC Count: 1
Serial Number: MT1928X02621
Model Number: MSN3700-VS2F
Hardware Revision: A1
Uptime: 19:42:39 up  9:46,  2 users,  load average: 0.40, 0.39, 0.44
Date: Fri 07 Oct 2022 19:42:39

Output of show techsupport:

sonic_dump_qa-eth-vt03-1-4600ca1_20221007_194235.tar.gz
sonic_dump_qa-eth-vt03-2-3700v_20221007_194228.tar.gz

Additional information you deem important (e.g. issue happens only occasionally):

SW1
-----------------------------------------------------
root@qa-eth-vt03-1-4600ca1:/home/admin# fdbshow
  No.    Vlan  MacAddress         Port        Type
-----  ------  -----------------  ----------  ------
    1      11  00:01:00:AA:AA:AA  Ethernet64  Static
Total number of entries 1
root@qa-eth-vt03-1-4600ca1:/home/admin# 

SW2
-----------------------------------------------------
root@qa-eth-vt03-2-3700v:/home/admin# show vxlan remotemac 1.1.1.1
+--------+-------------------+--------------+--------+---------+
| VLAN   | MAC               | RemoteVTEP   |    VNI | Type    |
+========+===================+==============+========+=========+
| Vlan11 | 00:01:00:aa:aa:aa | 1.1.1.1      | 770011 | dynamic |
+--------+-------------------+--------------+--------+---------+
Total count : 1

root@qa-eth-vt03-2-3700v:/home/admin# vtysh
qa-eth-vt03-2-3700v# show bgp l2vpn evpn 
...
   Network          Next Hop            Metric LocPrf Weight Path
Route Distinguisher: 1.1.1.1:4
*> [2]:[0]:[48]:[00:01:00:aa:aa:aa]
                    1.1.1.1                                0 1 i
                    RT:1:770011 ET:8                                <--- MAC Mobility Extended Community is expected
...
qa-eth-vt03-2-3700v# 

[dgsudharsan]

@adyeung Can you please assign someone to investigate this?

[kishorekunal01]

In FRR (sticky MAC) bit is not getting set in the MACIP route advertisement.
Recreated the issue on my setup, and seeing the originator router is not setting sticky MAC

From Techsupport:
Local node:
00:01:00:aa:aa:aa dev Ethernet64 vlan 11 master Bridge static

Remote node:
00:01:00:aa:aa:aa dev VTEP2-11 vlan 11 extern_learn master Bridge <<< Static is not set
00:01:00:aa:aa:aa dev VTEP2-11 dst 1.1.1.1 self extern_learn

[dgsudharsan]

Fixed in sonic-net/sonic-swss#2521