vlan forward no forward alcatel and ip routing cisco

[johnblack2045]

hello All,

-i have to translate alcatel config to cisco denali config

-here is my config in my switch Alcatel:

ip interface "vlan-100" vlan 100
ip interface "vlan-100" address xxx.xxx.xxx.xxx/24
ip interface "vlan-100" forward
ip interface "vlan-100" admin enable

ip interface "vlan-101" vlan 101
ip interface "vlan-101" address yyy.yyy.yyy.yyy/24
ip interface "vlan-101" no forward
ip interface "vlan-101" admin enable

in some discussions "vlan forward in switch Alcatel L3 "  is equal  "ip routing enable in Cisco switch L3 " 

for intervlan routing

shoud i use this " ip routing" with the configuration of my switch alcatel above

does that make sense ? how really translate it ?

Best Regards

[Georg Pauwen]

Hello,

on a Cisco L3 switch, you typically would have to enable 'ip routing' globally to achieve inter-Vlan routing indeed. I worked with Omniswitches a very long time ago, so I am not sure if anything has changed in the meantime, but apparently you can enable/disable a Vlan from participating in the routing by configuring 'forward' (the default) or 'no forward;'.

In any case, the equivalent config on the Cisco would be something like this:

ip routing

!

interface vlan 100
ip address xxx.xxx.xxx.xxx 255.255.255.0
!

interface vlan 101
ip address yyy.yyy.yyy.yyy 255.255.255.0

ip access-group 101 in

!

access-list 101 deny ip any any

There is no way to disable one specific Vlan interface from the routing process, but if you use an access list that denies all traffic, the same goal is achieved...