Switch 7700 Command reference Guide, v2.0

188 CHAPTER 5: USING ROUTING PROTOCOL COMMANDS
Description
■ Use the timer spf command to configure the interval for the SPF calculation
of corresponding level.
■ Use the undo timer spf command to restore the system default value, that is,
5 seconds.
Usually, when the LSDB of the corresponding level is changed, SPF calculation is
required. However, when the network is unstable and LSDB changes frequently, if
the SPF calculation is performed too frequently, the system efficiency will be
lowered. In a severe condition, other services will be affected. By setting proper
interval for performing SPF calculation, you can avoid the above situation.
Certainly, the interval for SPF calculation cannot be set too long, because a long
interval will prevent the current routing table from showing the actual network
condition. This sitting must be made according to actual conditions.
Example
Set the SPF calculation interval of the router to 3 seconds.
[SW7700-isis]timer spf 3
BGP Configuration
Commands
This section describes the commands you can use to configure Border Gateway
Protocol (BGP) on your Switch 7700.
For the commands defining routing policies in BGP, refer to the “Routing Policy" of
the next chapter.
aggregate Syntax
aggregate address mask [ as-set ] [ detail-suppressed ] [
suppress-policy route_policy_name ] [ origin-policy
route_policy_name ] [ attribute-policy route_policy_name ]
undo aggregate address mask [ as-set ] [ detail-suppressed ] [
suppress-policy route_policy_name ] [ origin-policy
route_policy_name ] [ attribute-policy route_policy_name ]
View
BGP view
Parameter
address: Address of the aggregated route.
mask: Network mask of the aggregated route.
as-set: Create a route with segment of AS_SET.
detail-suppressed: Only advertise the aggregated route.
suppress-policy route_policy_name: Suppress the specific route selected.
origin-policy route_policy_name: Select the originate routes used for
aggregation.