7920 can receive a ring.but when I pick it up,It dropped.what is the problem?

1240,1300,1400 or 1500? or any other type?thanks.

refer to the artical of the link:http://www.cisco.com/en/US/products/sw/iosswrel/ps1839/products_feature_guide09186a0080110be9.htmlI need some infomation about the data plane. when a packet go frome one side to the other,how did the frame format chan...

Suppose there is a PE router,take part in igp mpls,bgp ipv4 with label,vpnv4 and TE.Then when a packet pass the LSR from CE,the LSR will put several label on the packet.Then comes the question:How can the router determine the order of these labels wh...

for example:have a topo as belowlsr1---net1 |lsr2---net2 |lsr3---net3 |lsr4---net4all net belong to a same vpn.if,I say if lsr3 have a same label value for lsr4 and net3,then lsr3 how to tell if the label is a vpn label or a mpls forwording label....