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Brocade FastIron Ethernet Switch Layer 3 Routing Configuration Guide User Manual

Page 543

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show ipv6 bgp routes output descriptions (Continued)

TABLE 104

Field

Description

Weight

The value that this device associates with routes from a specific neighbor. For example, if the
receives routes to the same destination from two BGP4+ neighbors, the prefers the route from
the neighbor with the larger weight.

Status

The route’s status, which can be one or more of the following:

• A - AGGREGATE. The route is an aggregate route for multiple networks.
• B - BEST. BGP4+ has determined that this is the optimal route to the destination.
• b - NOT-INSTALLED-BEST - BGP4+ has determined that this is the optimal route to the

destination but did not install it in the IPv6 route table because the device received better
routes from other sources (such as OSPFv3, RIPng, or static IPv6 routes).

• C - CONFED_EBGP. The route was learned from a neighbor in the same confederation and

AS, but in a different sub-AS within the confederation.

• D - DAMPED. This route has been dampened (by the route dampening feature), and is

currently unusable.

• E - EBGP. The route was learned through a in another AS.
• H - HISTORY. Route dampening is configured for this route, and the route has a history of

flapping and is unreachable now.

• I - IBGP. The route was learned through a in the same AS.
• L - LOCAL. The route originated on this.
• M - MULTIPATH. BGP4+ load sharing is enabled and this route was selected as one of the

best ones to the destination. The best route among the multiple paths also is marked with
"B".

NOTE
If the "m" is shown in lowercase, the software was not able to install the route in the IPv6 route
table.

• S - SUPPRESSED. This route was suppressed during aggregation and thus is not advertised

to neighbors.

AS-PATH

The AS-path information for the route.

Syntax: show ipv6 bgp routes [ ipv6-prefix/prefix-length | table-entry-number | age seconds | as-path-
access-list
name | as-path-filter number | best | cidr-only | [ community number | no-export | no-
advertise
| internet | local-as ] | community-access-list name | community-filter number | detail [
option ] | local | neighbor ipv6-address | nexthop ipv6-address | no-best | prefix-list name | regular-
expression
regular-expression | route-map name | summary | unreachable ]

You can use the following options with the show ipv6 bgp routes command to determine the content
of the display:

The ipv6-prefix and prefix-length parameters display routes for a specific network. You must specify the
ipv6-prefix parameter in hexadecimal using 16-bit values between colons as documented in RFC 2373.
You must specify the prefix-length parameter as a decimal value. A slash mark (/) must follow the ipv6-
prefix
parameter and precede the prefix-length parameter.

The table-entry-number parameter specifies the table entry with which you want the display to start. For
example, if you specify 100, the display shows entry 100 and all entries subsequent to entry 100.

The ageseconds parameter displays only the routes that have been received or updated more recently
than the number of seconds you specify.

Configuring BGP4+

FastIron Ethernet Switch Layer 3 Routing Configuration Guide

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