Brocade Communications Systems FastIron SX 1600, Руководство по настройке, Страница: 371 / 593

allowed). If you set the Hold Time to 0, the device waits indefinitely for messages from a neighbor without concluding that the neighbor is
non-operational. The defaults for these parameters are the currently configured global Keep Alive Time and Hold Time.
unsuppress-map map-name removes route suppression from neighbor routes when those routes have been dampened due to
aggregation.
update-source ip-addr | ethernet unit/slot/portnum | loopback num | ve num configures the device to communicate with the neighbor
through the specified interface. There is no default.
weight num specifies a weight a device will add to routes received from the specified neighbor. BGP4 prefers larger weights over smaller
weights. The default weight is 0.
The send-label keyword enables IPv6 label capability for the IPv4 peers.
Removing route dampening from suppressed routes
You can selectively un-suppress specific routes that have been suppressed due to aggregation, and allow these routes to be advertised
to a specific neighbor or peer group.
device(config-bgp)# aggregate-address 10.1.0.0 255.255.0.0 summary-only
device(config-bgp)# show ip bgp route 10.1.0.0/16 longer
Number of BGP Routes matching display condition : 2
Status A:AGGREGATE B:BEST b:NOT-INSTALLED-BEST C:CONFED_EBGP D:DAMPED
E:EBGP H:HISTORY I:IBGP L:LOCAL M:MULTIPATH S:SUPPRESSED F:FILTERED
Prefix Next Hop Metric LocPrf Weight Status
1 10.1.0.0/16 0.0.0.0 101 32768 BAL
AS_PATH:
2 10.1.44.0/24 10.2.0.1 1 101 32768 BLS
AS_PATH:
In this example, the aggregate-address command configures an aggregate address of 10.1.0.0 255.255.0.0. and the summary-only
parameter prevents the device from advertising more specific routes contained within the aggregate route.
Entering a show ip bgp route command for the aggregate address 10.1.0.0/16 shows that the more specific routes aggregated into
10.1.0.0/16 have been suppressed. In this case, the route to 10.1.44.0/24 has been suppressed. If you enter this command, the
display shows that the route is not being advertised to the BGP4 neighbors.
device(config-bgp)# show ip bgp route 10.1.44.0/24
Number of BGP Routes matching display condition : 1
Status A:AGGREGATE B:BEST b:NOT-INSTALLED-BEST C:CONFED_EBGP D:DAMPED
E:EBGP H:HISTORY I:IBGP L:LOCAL M:MULTIPATH S:SUPPRESSED F:FILTERED
Prefix Next Hop Metric LocPrf Weight Status
1 10.1.44.0/24 10.2.0.1 1 101 32768 BLS
AS_PATH:
Route is not advertised to any peers
To override the summary-only parameter and allow a specific route to be advertised to a neighbor, enter commands such as the
following
device(config)# ip prefix-list Unsuppress1 permit 10.1.44.0/24
device(config)# route-map RouteMap1 permit 1
device(config-routemap RouteMap1)# exit
device(config)# router bgp
device(config-bgp)# neighbor 10.1.0.2 unsuppress-map RouteMap1
device(config-bgp)# clear ip bgp neighbor 10.1.0.2 soft-out
The ip prefix-list command configures an IP prefix list for network 10.1.44.0/24, which is the route you want to unsuppress. The next
two commands configure a route map that uses the prefix list as input. The neighbor command enables the device to advertise the
routes specified in the route map to neighbor 10.1.0.2. The clear command performs a soft reset of the session with the neighbor so
that the device can advertise the unsuppressed route.
Syntax: [no] neighbor { ip-addr | peer-group-name } unsuppress-map map-name
Basic configuration tasks required for BGP4
FastIron Ethernet Switch Layer 3 Routing
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