Configuring Bgp - Cisco WS-CBS3032-DEL Software Configuration Manual

Chapter 39 Configuring IP Unicast Routing
Table 39-8 IP EIGRP Clear and Show Commands
Command
clear ip eigrp neighbors [if-address | interface]
show ip eigrp interface [interface] [as number]
show ip eigrp neighbors [type-number]
show ip eigrp topology [autonomous-system-number] |
[[ip-address] mask]]
show ip eigrp traffic [autonomous-system-number]

Configuring BGP

The Border Gateway Protocol (BGP) is an exterior gateway protocol for an interdomain routing system
that guarantees the loop-free exchange of routing information between autonomous systems.
Autonomous systems are made up of routers operating under the same administration and run Interior
Gateway Protocols (IGPs), such as RIP or OSPF, within their boundaries and interconnecting by using
an Exterior Gateway Protocol (EGP). BGP Version 4 is the standard EGP for interdomain routing in the
Internet. You can find detailed information about BGP in Internet Routing Architectures, published by
Cisco Press, and in the "Configuring BGP" chapter in the Cisco IP and IP Routing Configuration Guide.
For details about BGP commands and keywords, see the "IP Routing Protocols" part of the Cisco IOS
IP Command Reference, Volume 2 of 3: Routing Protocols, Release 12.2. For a list of BGP commands
that are visible but not supported by the switch, see
Cisco IOS Release 12.2(58)SE."
Routers belonging to the same autonomous system and exchanging BGP updates run internal BGP
(IBGP). Routers belonging to different autonomous systems and exchanging BGP updates run external
BGP (EBGP). Most configuration commands are the same for configuring EBGP and IBGP. The
difference is that the routing updates are exchanged either between autonomous systems (EBGP) or
within an autonomous system (IBGP).
IBGP.
Figure 39-5
AS 100
Router B
175.220.212.1
OL-13270-06
EBGP , IBGP , and Multiple Autonomous Systems
Router A
129.213.1.2
EBGP
129.213.1.1
Cisco Catalyst Blade Switch 3130 and 3032 for Dell Software Configuration Guide
Purpose
Delete neighbors from the neighbor table.
Display information about interfaces configured for EIGRP.
Display EIGRP discovered neighbors.
Display the EIGRP topology table for a given process.
Display the number of packets sent and received for all or a
specified EIGRP process.
Appendix B, "Unsupported Commands in
Figure 39-5 shows a network that is running both EBGP and
Router D
192.208.10.2
IBGP
175.220.1.2
AS 300
192.208.10.1
EBGP
Router C
AS 200
Configuring BGP
39-47