Cisco 1127 8-port interface to Layer 3 port

[johnlloyd_13]

hi,

i'll be configuring a cisco 1127 router and will need two "inside" interface (1 inside and 1 DMZ).

i'm not sure if ports g0/1/0-7 are "layer 2 only" ports?

can this be converted to a layer 3 port/interface using the "no switchport" command so I can directly assign an IP instead of using SVI?

[marce1000]

   - For a router I would expect this to be 'default possible' ; I have not tested this on the particular model,

 M.

[Karsten Iwen]

I don't know this exact model, but for most router switch ports, you must configure a VLAN and assign it to the switch port, similar to what you do typically on a Layer 3 switch.

[Jens Albrecht · Accepted solution]

Hello @johnlloyd_13,

on these models it is possible to use 2 ports as so called flex-ports that can be converted to routed ports but the following limitations apply:

• Only the last 2 ports of front-panel fixed ports can be converted
• The minimum software version for this feature is IOS XE Release 17.11.1a

You can find the details about this new flex port feature here:

https://www.cisco.com/c/en/us/td/docs/routers/access/isr1100/software/configuration/xe-17/isr1100-sw-config-xe-17/configuring_ethernet_switchports.html#configuring-flex-support-on-layer-2-and-layer-3-ports

HTH!

[johnlloyd_13]

hi jens,

thanks for this info!

i just hope the 1100 comes with 17.11.1a to support flex port.

do you know the default IOS-XE when 1100 are shipped?

[Karsten Iwen]

17.12.5a is the suggested release anyhow ...

[Jens Albrecht]

We never received devices with the software version we wanted to use.

So upgrading to the current recommended version is a common task before deploying the config.