Show mac learned on lag interface

[JiangboHe]

- What I did
The code is to show mac learned on lag.
The funtion need to read the LAG_NAME_MAP_TABLE data.

- How I did it
To read mac table and get its learned portchannel name from LAG_NAME_MAP_TABLE in COUNTERS_DB with oid.

- How to verify it

1. Create PortChannel1 and add member port Ethernet10.
2. Create vlan 10 and add member port PortChannel1.
3. Create neighbor port PortChannel1 and add it to vlan 10.
4. "show mac‘’ to see if it could show mac on PortChannel1.

- Previous command output (if the output of a command-line utility has changed)
root@sonic:/home/admin# show mac
2000000000658

- New command output (if the output of a command-line utility has changed)
root@sonic:/home/admin# show mac
No. Vlan MacAddress Port Type

---

1      10  00:8C:FA:9A:31:E3  PortChannel1  Dynamic

[prsunny]

I dont think this assumption can be hard-coded here. You can check if the port_id exists in lag_if_oid_map, if so fetch from that and if not, get from if_oid_map

[JiangboHe]

Hi prsunny,
It is a very good suggestion, I have modified and tested the modifaction. The new commit is 6f281af.
Thanks.

[prsunny]

retest this please

[JiangboHe]

retest this please

This is the new test result yesterday:

root@sonic:/home/admin# show mac
No. Vlan MacAddress Port Type

---

1       2  00:8C:FA:C7:AE:B8  PortChannel1  Dynamic
2       3  80:05:88:5C:C7:75  Ethernet8     Dynamic

Total number of entries 2

[JiangboHe]

I see that the commit sonic-net/sonic-py-swsssdk#51 will also fix the error. But I think a better modification is to provide API with a unique function such as API to get oid-map for interface/lag/bridge_port/vlan.
I have push another pull request sonic-net/sonic-py-swsssdk#55 for this error fix.
Thanks.

[rameshsanth]

This change is needed in nbrshow as well.. "show arp" has exact same issue.

thanks,

[prsunny]

Merged, this - sonic-net/sonic-py-swsssdk#51. I think this should fix both fdb and nbr show.

[jleveque]

Retest this please

[prsunny]

@JiangboHe , can we close this PR as the fix is merged?