Symptom
ISR routers with SM-X modules SM-X-16G4M2X | SM-X-40G8M2X are not showing static MAC entries for their physical interfaces and HSRP/VRRP vMAC addresses in the "show mac address-table" output.
The issue occurs for interfaces part of the SM-X module and HSRP/VRRP running though interfaces part of the SM-X module.
The "show mac address-table" output returns only dynamically learned MAC addresses.
No static MAC addresses are present including interface MAC addresses and vMAC addresses of HSRP/VRRP.
ISR4461#show mac address-table vlan 100
Mac Address Table
-------------------------------------------
Vlan Mac Address Type Ports
---- ----------- -------- -----
100 aaaa.aaaa.aaaa DYNAMIC Gi1/0/0
Conditions
ISR4k or ISR1k series router with switch module SM-X-16G4M2X | SM-X-40G8M2X;
Workaround
The issue is cosmetic only and has no operational impact.
The associated MAC addresses can be seen with the command following command
"show platform software fed matm macTable vlan "
e.g. show platform software fed 1/0 matm macTable vlan 100
ISR4461#show platform software fed 1/0 matm macTable vlan 100
VLAN MAC Type Seq# EC_Bi Flags machandle siHandle riHandle diHandle *a_time *e_time ports Con
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
100 xxxx.xxxx.xxxx 0x2 0 0 64 0x7f2ec4d8ef98 0x7f2ec4d91e78 0x0 0x7f2ec47fe6d8 0 0 GigabitEthernet1/0/0.MOD0 Yes
100 aaaa.aaaa.aaaa 0x1 26 0 0 0x7f2ec4d8dd48 0x7f2ec4d80bd8 0x0 0x7f2ec4856d18 300 7 GigabitEthernet1/0/0 Yes
100 0000.0c9f.f001 0x2 0 0 64 0x7f2ec483a548 0x7f2ec483a1a8 0x0 0x7f2ec47fe6d8 0 0 GigabitEthernet1/0/0.MOD0 Yes
Further Problem Description
The issue is cosmetic only and has no operational impact.
