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tcp path-mtu-discovery black-hole-detect-threshold
Shutting Down an IP Interface
ip shutdown
Removing the IP Configuration
no ip interface
Copyright © 2010, Juniper Networks, Inc.
Specifying Black Hole Thresholds
A black hole threshold is a limit to the number of times a virtual router can retransmit
identical sequences of datagrams before the retransmissions are identified as a problem.
Some domains might be configured not to generate certain ICMP messages (like an ICMP
destination unreachable message) or to filter all ICMP messages. Under these conditions,
the source of oversized ICMP packets never learns that it is sending oversized packets.
The device continues sending oversized packets that never get through. This behavior is
often referred to as a black hole.
Use to specify the minimum MTU value used for the path MTU. If the discovered PMTU
value is less than the minimum setting, path MTU discovery is disabled for this
connection.
Example
host1:VR1(config)#tcp path-mtu-discovery black-hole-detect-threshold 200
Use the no version to disable black hole threshold detection.
See tcp path-mtu-discovery
You can disable an interface to the router at the IP level without removing it.
Use to shut down an IP interface.
Example
host1(config-if)#ip shutdown
Use the no version to restart the interface.
See ip shutdown
You can remove the IP configuration from an interface or subinterface.
Use to remove the IP configuration from an interface or subinterface and disable IP
processing on the interface.
Example
host1(config-if)#no ip interface
See no ip interface
Chapter 1: Configuring IP
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