Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
CE-router<br />
CE-router<br />
<strong>MPLS</strong> <strong>VPN</strong> <strong>VPN</strong> Support Support for for<br />
Internet Routing<br />
<strong>MPLS</strong> <strong>VPN</strong> Backbone<br />
IPv4 BGP for Internet<br />
PE-router P-router PE-router<br />
Core IGP Core IGP<br />
CE-router<br />
CE-router<br />
PE-routers can run standard IPv4 BGP in the global<br />
routing table<br />
• Exchange Internet routes with other PE routers<br />
• CE-routers do not participate in Internet routing<br />
• P-routers do not need to participate in Internet routing<br />
© 2002, Cisco Systems, Inc. www.cisco.com <strong>MPLS</strong> v2.1-80<br />
The routing requirements for PE-routers also extend to supporting Internet<br />
connectivity - PE-routers have to exchange Internet routes with other PE-routers.<br />
The CE-routers cannot participate in Internet routing if the Internet routing is<br />
performed in global address space. The P-routers could participate in Internet<br />
routing, however, you should disable Internet routing on the P-routers to make<br />
your network core more stable (please see the design guidelines in Core <strong>MPLS</strong><br />
<strong>Technology</strong> module for more details).<br />
90 Implementing Cisco <strong>MPLS</strong> (<strong>MPLS</strong>) v2.1 Copyright © 2002, Cisco Systems, Inc.
Change language