Bundling/Link Aggregation on a Cisco Router with more than 1 E1/T1 link

[r20039r20039]

Hi Experts

Is it possible to bundle more than one E1/T1 module on a single router and bundle their bandwidth and send that to another router/switch?

If yes, How? What does this process is named on books, and in the industry?  

[Mark Malone]

Hi

you can bundle links like that with multilink feature MLP

obviously both ends need to support it

http://www.cisco.com/c/en/us/td/docs/ios/qos/configuration/guide/15_1/qos_15_1_book/mlppp_over_serial.html

http://www.cisco.com/c/en/us/td/docs/routers/10000/10008/configuration/guides/broadband/bba/mlp.html

[Joseph W. Doherty]

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Posting

As Mark documents, MLPPP is often used to bundle E1/T1 interfaces.

Between routers, though, you can often route across multiple interfaces concurrently.  Many routing protocols, by default, will use equal cost links.  This technique has advantages and disadvantages over MLPPP.

Some hardware, such as ATM E1/T1 interfaces, often supports inverse mux, another method to bundle multiple links.

If you're working with Ethernet interfaces, some form of port channeling might be supported too.