Usage
Information
At least one of the routes included in the aggregate address must be in the BGP
routing table for the configured aggregate to become active.
Do not add the
as-set
parameter to the aggregate if routes within the aggregate
are constantly changing as the aggregate will flap to keep track of the changes in
the AS_PATH.
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 using the
network
command, that route still appears in the
routing table if you configure the
summary-only
parameter 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
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, use the
no bgp always-compare-med
command.
Defaults
Disabled (that is, the software only compares MEDs from neighbors within the
same AS).
Command
Modes
ROUTER BGP
Command
History
Version 9.2(0.0)
Introduced on the MXL 10/40GbE Switch IO Module.
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.
IPv6 Border Gateway Protocol (IPv6 BGP)
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