how many sub-interfaces we are able to create with ISR 4321 ?

[CSCO11976763]

Hi,

I want to buy an ISR 4321 router. I would like to know how many sub-interfaces we are able to create with this router (802.1Q) ?

http://www.cisco.com/c/dam/en/us/products/collateral/routers/4000-series-integrated-services-routers-isr/at-a-glance-c45-732425.pdf

Thanks.

Regards,

Nurul Kabir KHAN

[David Johan Castro Fernandez]

Hello Nurul,

The maximum number of interfaces (physical, subinterface, or virtual) a router can handle depends on the maximum number of SWIDBs that the router can use. This limit used to be set to 300 for all platforms, but with the emergence of features such as frame-relay subinterfaces, multilink Point-to-Point Protocol (PPP), and virtual private dial-up network (VPDN) that uses virtual interfaces, this value has proven to be insufficient on some platforms

Maximum Number of interfaces

Every interface uses an IDB. Therefore, the IDB limit indicates the maximum number of interfaces a router can handle.

The IDB limit is, therefore, the answer to the common question "How many (sub)interfaces can be configured on this platform?"

For further details, you can read this document

Please don't forget to rate and mark as correct the helpful post!

David castro 

Regards,

[CSCO11976763]

Hi,

Thank you very much.

Regards,

Nurul

[David Johan Castro Fernandez · Accepted solution]

HI Nurul,

It was a pleasure, if it was the correct answer please Mark it as correct! 

Regards!