Altering Bgp Intervals; Configuration Examples - HP ProCurve Secure Router 7203 dl Advanced Management And Configuration Manual

IP Routing—Configuring RIP, OSPF, BGP, and PBR
Configuring BGP
13-106
The administrative distance should be between 1 and 255. The default for
external routes is 20; for internal routes, 200; and for local routes, 200. For
example, enter:
ProCurve(config-bgp 1)# distance bgp 40 150 220

Altering BGP Intervals

Compared to OSPF and RIP, BGP routers exchange few messages. They only
send routes when they have a new route to advertise or a route to withdraw.
However, you can force the router to send advertisements to a neighbor at
specified intervals. You set the interval for each neighbor from the BGP
neighbor configuration mode context:
Syntax: advertisement-interval <seconds>
The interval can be between 0 and 600. For example:
ProCurve(config-bgp-neighbor)# advertisement-interval 120
You can also alter the hold timer both globally and for individual neighbors.
This timer determines how long the BGP router waits for an update before
terminating a session. It should be relatively high to keep the router from
continually having to restart sessions. To set the global timer, enter this
command from the BGP configuration mode context:
Syntax: hold-timer <seconds>
The hold timer can be between 0 and 65,535 seconds.
To set an override timer for an individual neighbor, set the timer from the
configuration mode context of that neighbor. For example:
ProCurve(config-bgp-neighbor)# hold-timer 180

Configuration Examples

The organization in Figure 13-20 is AS 3. It connects to customers through the
Internet. Router A provides the organization two Internet connections. The
organization needs to provide customer routes to its networks. Router A
advertises these routes to the two ISPs, which then distribute the routes to
the customer. The customer who attaches to the Internet can then communi-
cate with the private organization.