D-Link DXS-3600-32S CLI Guide - Page 168
timers bgp
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Usage Guideline DXS-3600 Series 10GbE Layer 2/3 Switch CLI Reference Guide Usually, a BGP speaker does not advertise a route to an external neighbor unless that route is local or exists in the IGP. By default, synchronization between BGP and the IGP is turned off to allow the switch to advertise a network route without waiting for route validation from the IGP. This feature allows routers and access servers within an autonomous system to have the route before BGP makes it available to other autonomous systems. Use the synchronization command if routers in the autonomous system do not speak BGP. You can verify your settings by entering the show ip bgp parameters command. Example This example shows how to enable synchronization in AS 65121. DXS-3600-32S#configure terminal DXS-3600-32S(config)#router bgp 65121 DXS-3600-32S(config-router)#synchronization DXS-3600-32S(config-router)# 7-94 timers bgp This command is used to adjust the BGP network timers. Use the no form of this command to restore to the default value. timers bgp KEEP-ALIVE HOLD-TIME no timers bgp Parameters KEEP-ALIVE HOLD-TIME Specifies the frequency, in seconds, with which the software sends KEEPALIVE messages to its BGP peer. The range is from 0 to 65535. Specifies the interval, in seconds, after not receiving a KEEPALIVE message that the software declares a BGP peer dead. The range is from 0 to 65535. Default Command Mode Command Default Level Usage Guideline KEEP-ALIVE: 60 seconds HOLD-TIME: 180 seconds Router Configuration Mode. Level: 8. (EI Mode Only Command) The suggested default value for the KEEPALIVE is 1/3 of the HOLDTIME. The timers configured for a specific neighbor or peer group (by the command neighbor timers) override the timers configured for all BGP neighbors using the timers bgp command. When the minimum acceptable HOLD-TIME is configured on a BGP router, a remote BGP peer session is established only if the remote peer is advertising a HOLD-TIME that is equal to, or greater than, the minimum acceptable HOLD-TIME interval. If the minimum acceptable HOLD-TIME interval is greater than the configured HOLDTIME, the next time the remote session tries to establish, it will fail and the local router will send a notification stating "unacceptable hold time." You can verify your settings by entering the show ip bgp parameters command. Example This example shows how to change the KEEPALIVE timer to 50 seconds and the HOLD-TIME timer to 150 seconds. DXS-3600-32S#configure terminal DXS-3600-32S(config)#router bgp 65100 DXS-3600-32S(config-router)#timers bgp 50 150 DXS-3600-32S(config-router)# 160