Huawei S9300 Configuration Manual page 129

S9300&S9300E Terabit Routing Switch
Configuration Guide - IP Service
l If the S9300&S9300E is disabled from sending ICMP redirection packets, the
l If the S9300&S9300E is disabled from sending ICMP host unreachable packets, the
Do as follows on the S9300&S9300E.
Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
icmp-reply fast
The fast ICMP reply function is enabled.
Step 3 Run:
icmp ttl-exceeded drop { slot slot-id
The LPU is configured to discard the ICMP packets whose TTL values are 1.
Step 4 Run:
icmp with-options drop { slot slot-id
The LPU is configured to discard the ICMP packets that carry options.
Step 5 Run:
icmp unreachable drop
The S9300&S9300E is configured to discard the ICMP Destination Unreachable packets.
Step 6 Run:
icmp port-unreachable send
The S9300&S9300E is configured to send ICMP Port Unreachable packets.
Step 7 Run:
icmp host-unreachable send
The S9300&S9300E is configured to send ICMP Host Unreachable packets.
Issue 01 (2012-03-15)
CAUTION
S9300&S9300E does not send ICMP redirection packets in any case.
S9300&S9300E does not send ICMP host unreachable packets in any case.
NOTE
After the fast ICMP reply function is enabled on the S9300&S9300E, the S9300&S9300E can respond to
ICMP Echo request packets quickly in the following situations:
l The S9300&S9300E does not have the ARP entry of the device that initiates the ping. However, the
S9300&S9300E cannot learn the ARP entry of this device in this case.
l The S9300&S9300E does not have a route to the device that initiates the ping.
l The checksum of the received ICMP Echo request packet is incorrect.
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