Black Box LRU4240 manual Summary-address, Timers spf, Related Commands 202 Sales 0870 90 10

Dual Trunk E1 Router

ospfd# show memory ospf

Related Commands

show memory all, show memory lib

summary-address

Use the summary-address command to summarize or suppress external routes with the specified address range.

Command Syntax

summary-address A.B.C.D/M (not-advertise)(tag <0-4294967295>)

A.B.C.D/M = The range of addresses given as IPv4 starting address and a mask indicating the range. not-advertise Suppresses external routes.

tag <0-4294967295> The default tag value is 0.

Command Mode

Router mode

Usage

An address range is a pairing of an address and a mask that is almost the same as IP network number. For example, if the specified address range is 192.168.0.0/255.255.240.0, it matches: 192.168.1.0/24, 192.168.4.0/22, 192.168.8.128/25 and so on. Redistributing routes from other protocols into OSPF requires the router to advertise each route individually in an external LSA. Use summary address command to advertise one summary route for all redistributed routes covered by a specified network address and mask. This helps decrease the size of the OSPF link state database.

Examples

The following example uses the summary-address command to aggregate external LSAs that match the network 172.16.0.0/24 and assign a Tag value of 3.

ospfd# configure terminal ospfd(config)# router ospf 100

ospfd(config-router)# summary-address 172.16.0.0/16 tag 3

Related Commands

timers spf

Use the timers spf command to adjust route-calculation timers.

Use the no parameter of this command to return to the default timer values.

Command Syntax

timers spf SPF-DELAY spf-holdtime

no timers spf SPF-DELAY SPF-HOLDTIME

SPF-DELAY= <0-4294967295> Specifies the delay between receiving a change to SPF calculation.The default spf-delay value is 5 seconds

SPF-HOLDTIME= <0-4294967295> Specifies hold time between consecutive SPF calculations. The default spf-holdtime value is 10 seconds.

Command Mode

Router mode

Usage

The timer spf command configures the delay time between the receipt of a topology change and the calculation of the Shortest Path First (SPF). This command also configure the hold time between two consecutive SPF calculations.

Examples

timers spf 67295 7295

Related Commands

202 SALES: 0870 90 10 750 Dual Trunk E1 Router User’s Guide