IP helper with ACL on SVI
Just another short post about IP helpers:
It took me last week a few minutes to figure out why my new configured IP helpers were not working.
The starting config was like:
interface Vlan6 description Voice VLAN ip address 192.168.1.251 255.255.255.0 ip access-group Voice in ip helper-address 192.168.15.1 ip helper-address 192.168.15.3 no ip redirects no ip unreachables standby 6 ip 192.168.1.254 standby 6 timers 1 2 standby 6 priority 110 standby 6 preempt
ip access-list extended Voice permit ip host 192.168.1.9 192.168.254.0 0.0.0.255 permit ip host 192.168.1.2 192.168.254.0 0.0.0.255 permit ip 192.168.1.0 0.0.0.255 192.168.15.0 0.0.0.255 permit ip any host 224.0.0.2