Monitoring Ospf; Configuring Eigrp - Cisco 3845 - Security Bundle Router Software Manual

Chapter 29 Configuring IP Unicast Routing

Monitoring OSPF

You can display specific statistics such as the contents of IP routing tables, caches, and databases.
Table 29-6
database privileged EXEC command options and for explanations of fields in the resulting display, see
the Cisco IOS IP Command Reference, Volume 2 of 3: Routing Protocols, Release 12.2.
Table 29-6 Show IP OSPF Statistics Commands
Command
show ip ospf [process-id]
show ip ospf [process-id] database [router] [link-state-id]
show ip ospf [process-id] database [router] [self-originate]
show ip ospf [process-id] database [router] [adv-router [ip-address]]
show ip ospf [process-id] database [network] [link-state-id]
show ip ospf [process-id] database [summary] [link-state-id]
show ip ospf [process-id] database [asbr-summary] [link-state-id]
show ip ospf [process-id] database [external] [link-state-id]
show ip ospf [process-id area-id] database [database-summary]
show ip ospf border-routes
show ip ospf interface [interface-name]
show ip ospf neighbor [interface-name] [neighbor-id] detail
show ip ospf virtual-links

Configuring EIGRP

Enhanced IGRP (EIGRP) is a Cisco proprietary enhanced version of the IGRP. EIGRP uses the same
distance vector algorithm and distance information as IGRP; however, the convergence properties and
the operating efficiency of EIGRP are significantly improved.
The convergence technology employs an algorithm referred to as the Diffusing Update Algorithm
(DUAL), which guarantees loop-free operation at every instant throughout a route computation and
allows all devices involved in a topology change to synchronize at the same time. Routers that are not
affected by topology changes are not involved in recomputations.
IP EIGRP provides increased network width. With RIP, the largest possible width of your network is
15 hops. Because the EIGRP metric is large enough to support thousands of hops, the only barrier to
expanding the network is the transport-layer hop counter. EIGRP increments the transport control field
only when an IP packet has traversed 15 routers and the next hop to the destination was learned through
EIGRP.
OL-23400-01
lists some of the privileged EXEC commands for displaying statistics. For more show ip ospf
Purpose
Display general information about OSPF routing
processes.
Display lists of information related to the OSPF
database.
Display the internal OSPF routing ABR and ASBR
table entries.
Display OSPF-related interface information.
Display OSPF interface neighbor information.
Display OSPF-related virtual links information.
Cisco ME 3800X and 3600X Switch Software Configuration Guide
Configuring EIGRP
29-33