Cisco ASR 1000 Series Configuration Manual page 16

Configuring ICMP Unreachable Rate Limiting User Feedback
SUMMARY STEPS
1. enable
2. clear ip icmp rate-limit [interface-type interface-number]
3. configure terminal
4. ip icmp rate-limit unreachable [df] [ms] [log [packets] [interval-ms]]
5. exit
6. show ip icmp rate-limit [interface-type interface-number]
DETAILED STEPS
Command or Action
Step 1 enable
Example:
Router> enable
Step 2
clear ip icmp rate-limit [interface-type
interface-number]
Example:
Router# clear ip icmp rate-limit
ethernet 2/3
Step 3
configure terminal
Example:
Router# configure terminal
Step 4 ip icmp rate-limit unreachable [df] [ms]
[log [packets] [interval-ms]]
Example:
Router(config)# ip icmp rate-limit
unreachable df log 1100 12000
IP Application Services Configuration Guide, Cisco IOS XE Release 3S (Cisco ASR 1000)
8
Purpose
Enables privileged EXEC mode.
• Enter your password if prompted.
Clears all current ICMP unreachable statistics for all configured interfaces.
The optional interface-type and interface-number arguments clear the
statistics for only one interface.
Enters global configuration mode.
Specifies the rate limitation of ICMP unreachable destination messages and
the error message log threshold for generating a message. The default is no
unreachable messages are sent more often than once every half second.
The arguments and keywords are as follows:
• df --(Optional) When "don't fragment" (DF) bit is set in the ICMP
header, a datagram cannot be fragmented. If the df keyword is not
specified, all other types of destination unreachable messages are sent.
• ms --(Optional) Interval at which unreachable messages are generated.
The valid range is from 1 to 4294967295.
• log --(Optional) List of error messages. The arguments are as follows:
• packets--(Optional) Number of packets that determine a threshold
for generating a log. The default is 1000.
Configuring IP Services