O'Reilly logo

MPLS Fundamentals by Luc De Ghein - CCIE No. 1897

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Aggregate Labels

Aggregate labels can be the result of aggregation or summarization of IP prefixes in the network. You can aggregate multiple IPv4 prefixes into one prefix with a smaller mask capturing all the component prefixes with longer masks. You can do this in an MPLS network, but it might not be a good idea. When the labeled packets arrive at the aggregation router, it removes the label and performs an IP lookup, and then it labels them again and forwards them. Do not aggregate on ATM LSRs for that reason. The aggregation label entails that the labeled packets must become unlabeled on the ATM LSR. For this to happen, the aggregating ATM LSR first reassembles the cells into a frame. When the aggregating ATM LSR forwards the packet by doing ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required