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Cisco Catalyst Blade Switch 3130 and 3032 for Dell Software Configuration Guide
OL-12247-04
Chapter 38 Configuring IP Unicast Routing
Configuring ISO CLNS Routing
You can also enable the logging of messages generated when a BGP neighbor resets, comes up, or goes
down by using the
bgp log-neighbor changes
router configuration command.
Configuring ISO CLNS Routing
The International Organization for Standardization (ISO) Connectionless Network Service (CLNS)
protocol is a standard for the network layer of the Open System Interconnection (OSI) model. Addresses
in the ISO network architecture are referred to as network service access point (NSAP) addresses and
network entity titles (NETs). Each node in an OSI network has one or more NETs. In addition, each node
has many NSAP addresses.
When you enable connectionless routing on the switch by using the
clns routing
global configuration
command, the switch makes only forwarding decisions, with no routing-related functionality. For
dynamic routing, you must also enable a routing protocol. The switch supports the Intermediate
System-to-Intermediate System (IS-IS) dynamic routing protocol that is based on the OSI routing
protocol for ISO CLNS networks.
When dynamically routing, you use IS-IS. This routing protocol supports the concept of
areas
. Within
an area, all routers know how to reach all the system IDs. Between areas, routers know how to reach the
proper area. IS-IS supports two levels of routing:
station routing
(within an area) and
area routing
(between areas).
The key difference between the ISO IGRP and IS-IS NSAP addressing schemes is in the definition of
area addresses. Both use the system ID for Level 1 routing (routing within an area). However, they differ
in the way addresses are specified for area routing. An ISO IGRP NSAP address includes three separate
fields for routing: the
domain
,
area
, and
system ID
. An IS-IS address includes two fields: a single
continuous
area
field (comprising the domain and area fields) and the
system ID
.
Note
For more detailed information about ISO CLNS, see the
Cisco IOS Apollo Domain, Banyan VINES,
DECnet, ISO CLNS and XNS Configuration Guide, Release 12.2
. For complete syntax and usage
information for the commands used in this chapter, see the
Cisco IOS Apollo Domain, Banyan VINES,
DECnet, ISO CLNS and XNS Command Reference, Release 12.2,
use the IOS command reference master
index, or search online.
show ip bgp neighbors
[
address
]
Display detailed information on the BGP and TCP connections to
individual neighbors.
show ip bgp neighbors
[
address
] [
advertised-routes
|
dampened-routes
|
flap-statistics
|
paths
regular-expression
|
received-routes
|
routes
]
Display routes learned from a particular BGP neighbor.
show ip bgp paths
Display all BGP paths in the database.
show ip bgp peer-group
[
tag
] [
summary
]
Display information about BGP peer groups.
show ip bgp summary
Display the status of all BGP connections.
Table 38-11
IP BGP Clear and Show Commands (continued)
Command
Purpose
