HP 6125XLG R2306-HP 6125XLG Blade Switch Network Management and Monitoring Con - Page 10

Prerequisites, Using a tracert command to identify failed or all nodes in a path, Tracert example

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6. The source device thinks that the packet has reached the destination device after receiving the port-unreachable ICMP message, and the path to the destination device is 1.1.1.2 to 1.1.2.2 to 1.1.3.2. Prerequisites Before you use a tracert command, perform the tasks in this section. For an IPv4 network: • Enable sending of ICMP timeout packets on the intermediate devices (devices between the source and destination devices). If the intermediate devices are HP devices, execute the ip ttl-expires enable command on the devices. For more information about this command, see Layer 3-IP Services Command Reference. • Enable sending of ICMP destination unreachable packets on the destination device. If the destination device is an HP device, execute the ip unreachables enable command. For more information about this command, see Layer 3-IP Services Command Reference. For an IPv6 network: • Enable sending of ICMPv6 timeout packets on the intermediate devices (devices between the source and destination devices). If the intermediate devices are HP devices, execute the ipv6 hoplimit-expires enable command on the devices. For more information about this command, see Layer 3-IP Services Command Reference. • Enable sending of ICMPv6 destination unreachable packets on the destination device. If the destination device is an HP device, execute the ipv6 unreachables enable command. For more information about this command, see Layer 3-IP Services Command Reference. Using a tracert command to identify failed or all nodes in a path Execute tracert commands in any view. Task Command • For IPv4 networks: tracert [ -a source-ip | -f first-ttl | -m max-ttl | -p port | -q packet-number Display the routes from source to | -vpn-instance vpn-instance-name | -w timeout ] * host destination. • For IPv6 networks: tracert ipv6 [ -f first-hop| -m max-hops | -p port | -q packet-number | -vpn-instance vpn-instance-name | -w timeout ] * host Tracert example Network requirements As shown in Figure 3, Device A failed to Telnet Device C. Test the network connectivity between Device A and Device C. If they cannot reach each other, locate the failed nodes in the network. 4

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4
6.
The source device thinks that the packet has reached the destination device after receiving the
port-unreachable ICMP message, and the path to the destination device is 1.1.1.2 to 1.1.2.2 to
1.1.3.2.
Prerequisites
Before you use a tracert command, perform the tasks in this section.
For an IPv4 network:
•
Enable sending of ICMP timeout packets on the intermediate devices (devices between the source
and destination devices). If the intermediate devices are HP devices, execute the
ip ttl-expires
enable
command on the devices. For more information about this command, see
Layer 3—IP
Services Command Reference
.
•
Enable sending of ICMP destination unreachable packets on the destination device. If the
destination device is an HP device, execute the
ip unreachables enable
command. For more
information about this command, see
Layer 3—IP Services Command Reference
.
For an IPv6 network:
•
Enable sending of ICMPv6 timeout packets on the intermediate devices (devices between the
source and destination devices). If the intermediate devices are HP devices, execute the
ipv6
hoplimit-expires enable
command on the devices. For more information about this command, see
Layer 3—IP Services Command Reference
.
•
Enable sending of ICMPv6 destination unreachable packets on the destination device. If the
destination device is an HP device, execute the
ipv6 unreachables enable
command. For more
information about this command, see
Layer 3—IP Services Command Reference
.
Using a tracert command to identify failed or all nodes in a
path
Execute
tracert
commands in any view.
Task
Command
Display the routes from source to
destination.
•
For IPv4 networks:
tracert
[
-a
source-ip
|
-f
first-ttl
|
-m
max-ttl
|
-p
port
|
-q
packet-number
|
-vpn-instance
vpn-instance-name
|
-w
timeout
] *
host
•
For IPv6 networks:
tracert ipv6
[
-f
first-hop
|
-m
max-hops
|
-p
port
|
-q
packet-number
|
-vpn-instance
vpn-instance-name
|
-w
timeout
] *
host
Tracert example
Network requirements
As shown in
Figure 3
, Device A failed to Telnet Device C.
Test the network connectivity between Device A and Device C. If they cannot reach each other, locate the
failed nodes in the network.