sham-link vs virtual-link ?

[francis.atienza]

whats the difference between sham-link and virtual-link ?

[Mark Malone · Accepted solution]

Hi

a sham-link is a feature specifically used in MPLS a backdoor between CE routers , a logical intra-area link

http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_ospf/configuration/15-sy/iro-15-sy-book/iro-sham-link.html

the virtual link is slightly different , in ospf each are must connect to the backbone  0 directly and in real world scenarios this is not always possible so the virtual links allows you to bridge across another ospf are to connect to area 0

http://www.cisco.com/c/en/us/support/docs/ip/open-shortest-path-first-ospf/47866-ospfdb7.html

[francis.atienza]

thanks for your clear answer Mark Malone