Avocent Access Router Cyclades-PR2000 User Manual
Page 79
Cyclades-PR2000
Chapter 9 - Routing Protocols
79
STEP TWO
The neighbor menu identifies the routers inside and outside the AS that will communicate with the router via BGP-
4. Each update message exchanged between routers contains path attributes. How these path attributes are
manipulated by the router when routes are received or sent to each neighbor is determined here.
CONFIG=>IP=>BGP4=>NEIGHBOR=>ADD
Parameter
Description
Name
A string to facilitate identification of the Neighbor. In the example above, the names
Popeye and Brutus could be used.
IP Address
The IP address at the other end of the connection. For AS 747, the value is
100.100.100.2.
Description
Another string to identify the Neighbor.
AS Number
The AS number assigned to the neighbor.
Source IP Address
When this number is set, the protocol accepts TCP/BGP connections only when the
destination IP is this value. For Popeye, the value would be 100.100.100.1.
Passive
Causes the router to not initiate BGP connections with this neighbor.
Transparent-AS
Yes causes the router to NOT include its own AS number in the "AS Path" path
attribute for update messages sent to this neighbor.
Transparent-NextHop Yes causes the router to NOT alter the "NextHop" path attribute for update messages
sent to this neighbor.
NextHop Self
Yes causes the router to change the NextHop path attribute for update messages sent
to this neighbor. The value is replaced by the Source IP Address set above.
Route Reflector Client Indicates that this router is a route reflector and the neighbor is a route reflector client.
Weight
Indicates the relative importance of the routes received from this neighbor. Routes
with greater weights are chosen over routes with lesser weights.
Maximum-Prefix
When set, indicates the maximum number of routes that the router will accept in a
single update message from this router.
Holdtime
When a message is not received from this neighbor for the holdtime, the neighbor is
considered inactive.
This table is continued.