Bgp Overview - Juniper NETWORK AND SECURITY MANAGER 2010.4 - CONFIGURING SCREENOS DEVICES GUIDE REV 01 Manual
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BGP Overview
Copyright © 2010, Juniper Networks, Inc.
To enable authentication, select one of the following authentication methods:
Clear Text Authentication—To use a simple password for authentication, select this
option and enter the password.
NOTE: All passwords handled by NSM are case-sensitive.
Multiple MD5 Authentication— To use MD5 keys for authentication, select this option,
and then configure the active MD5 key.
To use an existing MD5 key, select the key ID as the Active MD5 Key ID.
To add a new MD5 key, click the Add icon and configure a Key ID for the new MD5
key.
NOTE: You must use the same MD5 key for the sending and receiving
RIP routers.
RIP Overview on page 321
Global RIP Settings Overview on page 323
BGP Overview on page 327
Border Gateway Protocol (BGP) is a path-vector protocol that is used to carry routing
information between autonomous systems (ASs). To configure BGP, you must create
and enable the BGP routing instance in a virtual router by assigning an autonomous
system number to the BGP instance, and then enabling the instance. After you enable
and configure the BGP peer, you can then enable BGP on the interface that is connected
to the peer.
Before two BGP devices can communicate and exchange routes, they need to identify
each other so they can start a BGP session. You need to specify the IP addresses of the
BGP peers and, optionally, configure parameters for establishing and maintaining the
session. Peers can be either internal (IBGP) or external (EBGP) peers. For an EBGP peer,
you need to specify the autonomous system in which the peer resides.
All BGP sessions are authenticated by checking the BGP peer identifier and the AS number
advertised by the peers. A successful connection with a peer is logged. If anything goes
wrong with the peer connection, a BGP notification message is sent to or received from
the peer, which causes the connection to fail or close.
For instructions for configuring BGP settings on the virtual router and on the interface,
see the Network and Security Manager Online Help.
Chapter 10: Routing
327
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