Border Gateway Protocol (Bgp); Configuring Bgp; Address-Family Level Configuration (Configuration Can Also Be Set Without Entering The Af Mode) - AudioCodes mediant msbr series Configuration Manual

11.3

Border Gateway Protocol (BGP)

BGP is a standardized exterior gateway protocol (EGP) for exchanging routing and
reachability information between routers on different Autonomous Systems (AS's) in large
scale, internet provider and public internet networks.
It does not use the metrics used by IGP protocols (such as RIP, OSPF, EIGRP, ISIS),
however, makes its routing decisions based on paths, network policies and custom rules
configured by network administrators.
BGP is more stable and much less "chatty" protocols than the common IGP protocols, and
does not form adjacencies unless specifically configured. The formed adjacencies are
connection oriented and based on TCP connections.
BGP is the main routing protocol of internet service providers and the Internet.

11.3.1 Configuring BGP

The following describes the commands for configuring BGP.
11.3.1.1 Address-Family Level Configuration (configuration can also be set
without entering the AF mode)
Command
MSBR# configure data
(config-data)# router bgp as-
number
(conf-router)# address-family ipv4
[unicast]
(conf-router-af)# aggregate-
address prefix/[length][as-set]
[summery-only]
(conf-router-af)# bgp dampening
[1-45]
(conf-router-af)# neighbor address
activate
(conf-router-af)# neighbor address
aloowas-in [occ.]
(conf-router-af)# neighbor address
attribute-unchanged [as-
path/med/next-hop]
(conf-router-af)# neighbor address
capability orf prefix-list
<both/receive/send>
(conf-router-af)# neighbor address
default-originate [route-map]
(conf-router-af)# neighbor address
filter-list name <in/out>
(conf-router-af)# neighbor address
maximum-prefix num [threshold]
[restart] [warning-only]
(conf-router-af)# neighbor address
Configuration Guide
Description
Enters the data configuration menu.
Enters the BGP configuration mode and the
number of the local autonomous system.
Enters the address-family configuration mode.
Configures BGP aggregate entries.
Configures route-flap dampening.
Enables the address family for the specified
neighbor.
Accepts as-path with local AS present in it.
Configures unchanged propagation of the
specified attribute to the neighbor.
Advertises ORF capability to the specified
neighbor.
Advertises default route to the specified
neighbor.
Configures BGP AS-Path filter list.
Configures a maximum number of prefixes that
can be learned from the specified neighbor.
Configures advertisement of self as next-hop for
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IP Networking Configuration
Document #: LTRT-31657