Arista LACP Interfaces

Arista appears to have implemented the LACP mib incorrectly (or at least different from other device vendors). Hence we have to override the base SnmpConnector()._get_lacp_data() function.

See switches/connect/snmp/arista_eos/connector.py around line 101

The learning of the LACP Port-Channel interfaces by reading dot3adAggActorAdminKey is correct. We parse this with the standard base SnmpConnector()._parse_mibs_lacp_admin_key()

Next, reading dot3adAggPortActorAdminKey is supposed to return the member interface ifIndex, pointing to the ifIndex of the LACP Port-Channel interface in the returned value (val).

However, this returns the port-channel number in ‘val’! Hence we parse this separately in SnmpConnectorAristaEOS()._parse_mibs_lacp_member_port_arista to find the proper Port-Channel<val> that a member interface belongs to.

E.g.:

The read data is “dot3adAggPortActorAdminKey.<1001> = 9” This means that interface with ifIndex 1001 is a member of Port-Channel9