Enabling An Interface To Send Icmp Unreachable Packets; Figure 15-4 Icmp Unreachable Packet Function Configuration Example - Zte ZXR10 ZSR V2 Configuration Manual (System Management

Configuration Example
l Configuration Description
As shown in
unreachable packets are valid.

Figure 15-4 ICMP Unreachable Packet Function Configuration Example

l
Configuration Flow
1. Enter ICMP configuration mode.
2. Enable the ICMP unreachable packet function on a specified interface.
3. Configure that interface ICMP unreachable packets are valid.
l Configuration Commands
Run the following commands on R1:
R1(config)#icmp-config
R1(config-icmp)#interface gei-1/1
R1(config-icmp-if-gei-1/1)#ip unreachable
R1(config-icmp-if-gei-1/1)#exit
R1(config-icmp)#exit
R1(config)#interface gei-1/1
R1(config-if-gei-1/1)#ip address 60.0.0.1 255.255.255.0
R1(config-if-gei-1/1)#no shutdown
R1(config-if-gei-1/1)#ip forward unreachable
R1(config-if-gei-1/1)#exit
l Configuration Verification
When the PC sends unknown protocol packets to R1, R1 sends ICMP unreachable
packets to the PC.
15.4 Enabling an Interface to Send ICMP Unreachable
Packets
Overview
Packets that are regarded as ICMP unreachable are dropped. To make these packets
valid, you need to configure this function for the interface. Then, the forwarding plane
reports a packet whose protocol is unknown or whose route cannot be found to the control
plane. The control plane returns an ICMP unreachable packet to the source node. This
function is disabled by default.
SJ-20140504150128-007|2014-05-10 (R1.0)
Figure 15-4, R1 receives packets with an unknown protocol, and ICMP
15-7
Chapter 15 Network Layer Detection
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