Brocade Communications Systems FastIron X Series User Manual

allowed). If you set the Hold Time to 0, the device waits indenitely for messages from a neighbor without concluding that the neighbor is
non-operational. The defaults for these parameters are the currently congured 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 | ethernetunit/slot/portnum | loopbacknum | venum congures the device to communicate with the neighbor
through the specied interface. There is no default.
weight num species a weight a device will add to routes received from the specied 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
specic routes that have been suppressed due to aggregation, and allow these routes to be advertised
to a specic 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
congures an aggregate address of 10.1.0.0 255.255.0.0. and the summary-only
parameter prevents the device from advertising more specic 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 specic 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
specic 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
prex-list command congures an IP prex list for network 10.1.44.0/24, which is the route you want to unsuppress. The next
two commands congure a route map that uses the prex list as input. The neighbor command enables the device to advertise the
routes specied 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 conguration tasks required for BGP4
FastIron Ethernet Switch Layer 3 Routing
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Brocade Communications Systems FastIron X Series Specifications

General

Brand	Brocade Communications Systems
Model	FastIron X Series
Category	Switch
Language	English