Reference Guide

IPv6 Border Gateway Protocol (IPv6 BGP) | 737
In route maps used in the suppress-map parameter, routes meeting the deny clause are not
suppress; in other words, they are allowed. The opposite is true: routes meeting the permit clause are
suppressed.
If the route is injected via the network command, that route will still appear in the routing table if the
summary-only parameter is configured in the aggregate-address command.
The summary-only parameter suppresses all advertisements. If you want to suppress advertisements to
only specific neighbors, use the neighbor distribute-list command.
In the show ip bgp ipv6 unicast command, aggregates contain an ‘a’ in the first column and routes
suppressed by the aggregate contain an ‘s’ in the first column.
bgp always-compare-med
c e
Allows you to enable comparison of the MULTI_EXIT_DISC (MED) attributes in the paths from
different external ASs.
Syntax
bgp always-compare-med
To disable comparison of MED, enter no bgp always-compare-med.
Defaults
Disabled (that is, the software only compares MEDs from neighbors within the same AS).
Command Modes
ROUTER BGP
Command
History
Usage
Information
Any update without a MED attribute is the least preferred route.
If you enable this command, use the capture bgp-pdu max-buffer-size * command to recompute the
best path.
bgp bestpath as-path ignore
c e
Ignore the AS PATH in BGP best path calculations.
Syntax
bgp bestpath as-path ignore
To return to the default, enter no bgp bestpath as-path ignore.
Defaults
Disabled (that is, the software considers the AS_PATH when choosing a route as best).
Command Modes
ROUTER BGP
Command
History
Version 8.4.2.1 Introduced on C-Series and S4810.
Version 8.2.1.0 Introduced on E-Series ExaScale
Version 7.4.1.0 Introduced on E-Series TeraScale
Version 8.4.2.1 Introduced on C-Series and S4810.