I just tried pinging to the broadcast address of a subnet to see how many hosts reply to it.
I saw some replies from IPs that were other the subnet. when i checked the L3 configuration i saw a secondary address associated with the interface but i am unable to understand the behavior
router#p 172.16.56.255
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.56.255, timeout is 2 seconds:
Reply to request 0 from 172.16.56.2, 8 ms
Reply to request 0 from 144.12.16.208, 8 ms
Reply to request 0 from 144.12.16.14, 8 ms
Reply to request 0 from 172.16.56.4, 8 ms
Reply to request 0 from 172.16.56.3, 8 ms
Reply to request 0 from 144.12.16.3, 8 ms
Reply to request 1 from 144.12.16.208, 4 ms
Reply to request 1 from 144.12.16.14, 4 ms
Reply to request 1 from 172.16.56.4, 4 ms
Reply to request 1 from 172.16.56.6, 4 ms
Reply to request 1 from 172.16.56.3, 4 ms
Reply to request 1 from 144.12.16.3, 4 ms
layer 3#sh run int vlan 1
Building configuration...
Current configuration : 222 bytes
!
interface Vlan1
ip address 172.16.56.5 255.255.255.0 secondary
ip address 144.12.16.14 255.255.255.0
no ip redirects
no ip unreachables
end
thanks in advance
