D-Link DGS-3630 Emulator 1 - Page 187
bgp bestpath compare-confed-aspath, MI and EI Mode Only
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DGS-3630 Layer 3 Stackable Managed Switch CLI Reference Guide Command Default Level Level: 12. Usage Guideline The best path is selected based on the following algorithm. The paths are evaluated in sequence of the following rules. • The path with the highest weight is preferred. • The path with the highest local preference is preferred. • The local routes generated by network command, redistribute command and aggregate command is preferred over other routes. The routes generated by network and redistribute command has higher preference than aggregate route. • The path with shorter AS path is preferred. • The origin attribute is compared. IGP is preferred over EGP, EGP is preferred over incomplete. • The path with lower MED is preferred. • The eBGP path is preferred over the iBGP path. • The path which has the lowest IGP metric to the next hop is preferred. • The path with the lowest router ID is preferred. • When two paths are both external, the older path is preferred. • Prefer the path from the neighbor with lowest IP address. You can use the commands, bgp bestpath as-path ignore, bgp bestpath compare-routerid or bgp bestpath med missing-as-worst to customize the path selection process. Example This example shows how to configure to ignore the AS-PATH for the best path for autonomous system 65534. Switch# configure terminal Switch(config)# router bgp 65534 Switch(config-router)# bgp bestpath as-path ignore Switch(config-router)# 13-9 bgp bestpath compare-confed-aspath (MI and EI Mode Only) This command is used to configure a BGP routing process to compare the confederation AS path length of the routes received. Use the no form of this command to revert to the default setting. bgp bestpath compare-confed-aspath no bgp bestpath compare-confed-aspath Parameters None. Default By default, this option is disabled. Command Mode Router Configuration Mode. Command Default Level Level: 12. 182
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