PDF 300-410 Study Guide

A label edge router (LER, also known as edge LSR) is a router that operates at the edge of an MPLS network and acts as the entry and exit points for the network. LERs push an MPLS label onto an incoming packet and pop it off an outgoing packet.

From the output we can see there are 2 NHRP Peers. The first one with the NBMA Address of

172.18.16.2 and the “Attribute” (Attrb) of Static (S) so we can deduce it is the Hub device.

Therefore the second one must be the remaining Spoke device with the attribute of Dynamic

(D).

-- > S - Static, D - Dynamic, I - Incomplete

N - NATed, L - Local, X - No Socket

# Ent -- > Number of NHRP entries with same NBMA peer

NHS Status: E -- > Expecting Replies, R -- > Responding, W -- > Waiting

UpDn Time -- > Up or Down Time for a Tunnel

========================================================================

==

Interface: Tunnel1, IPv4 NHRP Details

Type:Spoke, NHRP Peers:2,

# Ent Peer NBMA Addr Peer Tunnel Add State UpDn Tm Attrb

----- --------------- --------------- ----- -------- -----

1 44.44.44.4 192.168.100.254 UP 00:03:40 S

1 12.12.12.2 192.168.100.2 UP 00:03:20 D