Administrator Guide

ManualsBrandsDell ManualsAccess PlatformsC9010 Modular Chassis Switch

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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 via the network command, that route still appears 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 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.

C9000 Series

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 Description

9.9(0.0) Introduced on the C9010.

9.2(1.0) Introduced on the Z9500.

8.2.1.0 Introduced on the E-Series ExaScale.

7.4.1.0 Introduced

Usage Information

Any update without a MED attribute is the least preferred route.

If you enable this command, use the clear ip bgp * command to recompute the best path.

bgp bestpath as-path ignore

Ignore the AS PATH in BGP best path calculations.