Dell PowerSwitch S4112F-ON EMC SmartFabric OS10 User Guide Release 10.5.0 - Page 580

• half-life - Number of minutes after which the penalty decreases (1 to 45, default 15). After the router assigns a penalty of 1024 to a route, the penalty decreases by half after the half-life period expires. • reuse - Number compares to the flapping route's penalty value. If the penalty value is less than the reuse value, the flapping route again advertises or is no longer suppressed (1 to 20000, default 750). Withdrawn routes are deleted from the history state. • suppress - Number compares to the flapping route's penalty value. If the penalty value is greater than the suppress value, the flapping route no longer advertises and is suppressed (1 to 20000, default 2000). • max-suppress-time - Maximum number of minutes a route is suppressed (1 to 255, default is four times the half-life value or 60 minutes). 2. View all flap statistics or for specific routes meeting the criteria in EXEC mode. show ip bgp flap-statistics [ip-address [mask]] • ip-address [mask]- Enter the IP address and mask. • filter-list as-path-name - Enter the name of an AS-PATH ACL. • regexp regular-expression - Enter a regular express to match on. When you change the best path selection method, path selections for the existing paths remain unchanged until you reset it by using the clear ip bgp command in EXEC mode. Configure values to reuse or restart route OS10(config)# router bgp 102 OS10(conf-router-bgp-102)# address-family ipv4 unicast OS10(conf-router-bgpv4-af)# dampening 2 2000 3000 10 View dampened (nonactive) routes OS10# show ip bgp flap-statistics BGP local router ID is 13.176.123.28 Status codes: s suppressed, S stale, d dampened, h history, * valid, > best Origin codes: i - IGP, e - EGP, ? - incomplete Network From Reuse Path Total number of prefixes: 0 View dampened paths OS10# show ip bgp dampened-paths BGP local router ID is 80.1.1.1 Status codes: s suppressed, S stale, d dampened, h history, * valid, > best Origin codes: i - IGP, e - EGP, ? - incomplete Network From Reuse Path d* 3.1.2.0/24 80.1.1.2 00:00:12 800 9 8 i d* 3.1.3.0/24 80.1.1.2 00:00:12 800 9 8 i d* 3.1.4.0/24 80.1.1.2 00:00:12 800 9 8 i d* 3.1.5.0/24 80.1.1.2 00:00:12 800 9 8 i d* 3.1.6.0/24 80.1.1.2 00:00:12 800 9 8 i Total number of prefixes: 5 Timers To adjust the routing timers for all neighbors, configure the timer values using the timers command. If both the peers negotiate with different keepalive and hold time values, the final hold time value is the lowest values received. The new keepalive value is one-third of the accepted hold time value. • Configure timer values for all neighbors in ROUTER-NEIGHBOR mode. timers keepalive holdtime ○ keepalive - Time interval in seconds, between keepalive messages sent to the neighbor routers (1 to 65535, default 60). ○ holdtime - Time interval in seconds, between the last keepalive message and declaring the router dead (3 to 65535, default 180). 580 Layer 3