ipv4 unreachables disable (BNG)
To disable the generation of IPv4 Internet Control Message Protocol (ICMP) unreachable messages, use the
ipv4 unreachables disable command in an appropriate configuration mode. To re-enable the generation of
ICMP unreachable messages, use the no form of this command.
ipv4 unreachables disable
no ipv4 unreachables disable
Syntax Description
This command has no keywords or arguments.
Command Default
IPv4 ICMP unreachables messages are generated.
Command Modes
Interface configuration (for releases prior to R4.2.0)
Dynamic template configuration (for releases R4.2.0 onward)
Command History
ModificationRelease
This command was introduced.Release 3.7.2
This command was supported in the dynamic template configuration
mode for BNG.
Release 4.2.0
Usage Guidelines
If the software receives a nonbroadcast packet destined for itself that uses a protocol it does not recognize, it
sends an ICMP protocol unreachable message to the source.
If the software receives a datagram that it cannot deliver to its ultimate destination because it knows of no
route to the destination address, it replies to the originator of that datagram with an ICMP host unreachable
message.
This command affects a number of ICMP unreachable messages.
For releases R4.2.0 onward, to enter the dynamic template configuration mode, run the dynamic-template
command in the Global Configuration mode.
Task ID
OperationsTask ID
read, writeipv4
read, writenetwork
read, writeconfig-services
Cisco ASR 9000 Series Aggregation Services Router Broadband Network Gateway Command Reference,
Release 5.2.x
302
IPv4 and IPv6 Commands
ipv4 unreachables disable (BNG)
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