IP Unicast Commands
ExtremeWare XOS 11.5 supports only the Summit X450 family of switches and the BlackDiamond 8800 series switch.
ExtremeWare XOS 11.5 Command Reference Guide
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configure iproute add blackhole
configure iproute add blackhole [<ipNetmask> | <ipaddress> <mask>] {vr
<vrname>} {multicast-only | unicast-only}
Description
Adds a blackhole address to the routing table. All traffic destined for a configured blackhole IP address
is silently dropped, and no Internet Control Message Protocol (ICMP) message is generated.
Syntax Description
Default
If you do not specify a virtual router, the current virtual router context is used.
Usage Guidelines
A blackhole entry configures packets with the specified destination IP subnet to be discarded. Blackhole
entries are useful as a security measure or in special circumstances where a specific destination IP
subnet must be discarded. Blackhole entries are treated like permanent entries in the event of a switch
reset or power off/on cycle.
Example
The following command adds a blackhole address to the routing table for packets with a destination
address of 100.101.145.4:
configure iproute add blackhole 100.101.145.4/32
History
This command was first available in ExtremeWare XOS 10.1.
Platform Availability
This command is available on all platforms.
ipNetmask
Specifies an IP address/mask length.
ipaddress
Specifies an IP address.
mask
Specifies a subnet mask.
vrname
Specifies the virtual router to which the route is added.
multicast-only
Specifies only multicast traffic for the route.
unicast-only
Specifies only unicast traffic for the route.
