Mac-address table in IOS Routers

[snarayanaraju]

Hi All, Probably my ask may sound  insane, but I am much curious to get answered.

Will Router maintain a CAM Table for its connected Layer3(routed) interfaces and Layer 3 sub-interfaces? I am seeing the MAC address is empty in my router, though "show ip arp" table is filled with MAC & IP address.

Why MAC address table is empty?.

Thanks / SAIRAM

rtr1-arabon#sho ip int bri

Interface                  IP-Address      OK? Method Status                Protocol

Serial0/3/0                unassigned      YES NVRAM  up                    up

Serial0/3/0.777            10.134.214.1  YES NVRAM  up                    up

Port-channel1.2            10.134.215.1  YES NVRAM  up                    up

Port-channel1.10           10.134.216.2    YES NVRAM  up                    up

rtr1-arabon#show mac-address-table

[Emmanouil Patiniotakis]

Hello,

MAC are only present on Ethernet interfaces.