Cannot ping between 2 NIM-ES2-8 modules in the same ISR 4221

[jaime@infotrans.cw]

Hi,

I have a new ISR 4221 with 2 NIM-ES2-8 modules in it and the software version is Cisco IOS XE Software, Version 16.09.02.

I can not ping between 2 hosts connected on each of the modules. When I place the same 2 hosts on one either one of the modules I can ping fine between the hosts. does anyone know what the issue could be?

I would appreciate your support in this.

[luis_cordova]

Hi jaime@infotrans.cw,

Check what  this link says:

The 4- and 8-port Gigabit Ethernet LAN Switch NIMs provide line-rate Layer 2 switching across onboard Gigabit Ethernet ports. The 4-port NIM has four 10/100/1000 switched Gigabit Ethernet ports. The 8-port NIM has eight 10/100/1000 switched Gigabit Ethernet ports, with a PoE/PoE+ version capable of powering all eight ports. The NIMs furthermore enable direct module-to-module communication through the use of the multigigabit fabric (MGF).

Multigigabit Fabric

The LAN switch NIMs have a gigabit connection to the MGF and transparently integrate into the system. Connecting over the MGF enables the NIM to directly communicate with other MGF-enabled modules in the system without involving the router’s forwarding architecture (Figure 2). Throughput for direct module-to-module traffic using the MGF will thereby not be limited by the platform’s performance license levels. Layer 2 switching of packets is thus done at the full Gigabit Ethernet line rate, either local to each LAN switch NIM or when transferring the MGF with multiple MGF-enabled modules installed in the system; module-to-module MGF traffic throughput is limited to 1 Gbps.

Figure 2.      Direct Module-to-Module Connection Without Involving CPU

https://www.cisco.com/c/en/us/products/collateral/routers/4000-series-integrated-services-routers-isr/data_sheet_c78-612808.html

I hope this information will be useful to you

Regards

[jaime@infotrans.cw]

Hi Luis, thank you for your email. It certainly points me in the right direction. I have a question though. Do we need to download a module firmware to enable the MGF feature?


Krs,

[luis_cordova]

Hi jaime@infotrans.cw,

I think it depends of the module.

I leave you these links for more information:

https://www.cisco.com/c/en/us/td/docs/routers/access/interfaces/software/feature/guide/mgfcfg.html

https://www.cisco.com/c/en/us/td/docs/interfaces_modules/services_modules/sre_v/1-0/user/guide/sre_v/app_interface.html

Regards

[Scott Plank]

Did you find a solution for this? We are having the same issue on a 4321 with two NIM-ES2-8 modules on 16.9.2.