Siemens S223 - Manual (Page 322)

UMN:CLI User Manual
SURPASS hiD 6615 S223/S323 R1.5
322 A50010-Y3-C150-2-7619
To ignore AS-path for selecting the best path, use the following command.
Command Mode Description
bgp bestpath as-path ignore
Ignores the information of AS-path as a factor in the
algorithm for choosing the best route.
no bgp bestpath as-path ignore
Router
Considers the information of AS-path as a factor in the
algorithm for choosing the best route.
If you would like to configure to select the best route by considering AS-path length of
Confederation, you should configure the router first to ignore AS-path for choosing the
best route using the bgp bestpath as-path ignore command before implementing the
following command.
To consider AS-path length of Confederation during the best-path selection process, use
the following command.
Command Mode Description
bgp bestpath compare-confed-
aspath
Considers the information of AS-path length of confed-
eration as a factor in the algorithm for choosing the best
route.
no bgp bestpath compare-
confed-aspath
Router
Ignores AS-path length of confederation as a factor in
the algorithm for choosing the best route.
When comparing similar routes from more than 2 peers the BGP router does not consider
router ID of the routes. It selects the first received route. The hiD 6615 S323 uses router
ID in the selection process; similar routes are compared and the route with lowest router
ID is selected as the best route. Router ID can be manually set by using the following
command.
To select the best path by comparing router ID, use the following command. However, the
default condition is that BGP receives routes with identical eBGP paths from eBGP peers.
Command Mode Description
bgp bestpath compare-routerid
Selects the best path using the router ID for identical
eBGP paths.
no bgp bestpath compare-
routerid
Router
Disables selecting the best path using the router ID.
The hiD 6615 S323 is basically configured not to compare MED values of the path infor-
mation that exchanges between the Confederation Peers. But just in case, it can be con-
figured to compare MED values of the path information that exchanges between Confed-
eration Peers.
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