Everton da Silva Marques <> wrote on Tuesday, April 24, 2007 11:16 PM:
> From: > http://www.ciscopress.com/articles/article.asp?p=680824&seqNum=2&rl=1 > > PHP is the default mode in Cisco IOS. In the case of > IPv4-over-MPLS, Cisco IOS only advertises the implicit > NULL label for directly connected routes and > summarized routes. > > Question: What is the reasoning behind restricting > implicit-null to connected and summarized routes? > Can anyone please shed some light on why it > should not include static routes as well? Well, this paragraph is not 100% accurate. If your static doesn't require any addtl. IP lookup on the PE/edge-LSR (i.e. if you point it to a p2p interface), IOS will allocate a regular label and advertises it accordingly. For other cases (i.e. "ip route ... Ethernet0" or "ip route ... Null0", IOS advertises implicit-null to allow an addtl. IP lookup (and to trigger arp if required). oli _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
