Alcatel Carrier Internetworking Solutions 8800 User Manual
Troubleshooting Source Learning
Advanced Troubleshooting
OmniSwitch Troubleshooting Guide
September 2005
page 3-5
Once, the MAC addresses are learned on the ports then the devices should be able to communicate
depending on the upper layers. Variations of MAC-related commands can be viewed in the “Managing
Source Learning” chapter from the appropriate OmniSwitch Network Configuration Guide.
depending on the upper layers. Variations of MAC-related commands can be viewed in the “Managing
Source Learning” chapter from the appropriate OmniSwitch Network Configuration Guide.
Advanced Troubleshooting
The advanced troubleshooting for Source learning related problems is to look whether the traffic is
coming in from a port and the NI is not learning the MAC, if not prevented by using any other rules.
coming in from a port and the NI is not learning the MAC, if not prevented by using any other rules.
->debug ip packet board ni 8 start
R 8/23 00c04f12f71b->00d0957962c4 IP 10.40.114.50->10.40.114.2 ICMP 8,0
seq=58460.
8 S 8/23 00d0957962c4->00c04f12f71b IP 10.40.114.2->10.40.114.50 ICMP 0,0
seq=58460.
ebug ip 8 R 8/23 00c04f12f71b->00d0957962c4 IP 10.40.114.50->10.40.114.2 ICMP
8,0 seq=58716.
8 S 8/23 00d0957962c4->00c04f12f71b IP 10.40.114.2->10.40.114.50 ICMP 0,0
seq=58716.
packet 8 R 8/23 00c04f12f71b->00d0957962c4 IP 10.40.114.50->10.40.114.2 ICMP 8,0
seq=58972.
8 S 8/23 00d0957962c4->00c04f12f71b IP 10.40.114.2->10.40.114.50 ICMP 0,0
seq=58972.
stop8 R 8/23 00c04f12f71b->00d0957962c4 IP 10.40.114.50->10.40.114.2 ICMP 8,0
seq=59228.
8 S 8/23 00d0957962c4->00c04f12f71b IP 10.40.114.2->10.40.114.50 ICMP 0,0
seq=59228.
R 8/23 00c04f12f71b->00d0957962c4 IP 10.40.114.50->10.40.114.2 ICMP 8,0
seq=58460.
8 S 8/23 00d0957962c4->00c04f12f71b IP 10.40.114.2->10.40.114.50 ICMP 0,0
seq=58460.
ebug ip 8 R 8/23 00c04f12f71b->00d0957962c4 IP 10.40.114.50->10.40.114.2 ICMP
8,0 seq=58716.
8 S 8/23 00d0957962c4->00c04f12f71b IP 10.40.114.2->10.40.114.50 ICMP 0,0
seq=58716.
packet 8 R 8/23 00c04f12f71b->00d0957962c4 IP 10.40.114.50->10.40.114.2 ICMP 8,0
seq=58972.
8 S 8/23 00d0957962c4->00c04f12f71b IP 10.40.114.2->10.40.114.50 ICMP 0,0
seq=58972.
stop8 R 8/23 00c04f12f71b->00d0957962c4 IP 10.40.114.50->10.40.114.2 ICMP 8,0
seq=59228.
8 S 8/23 00d0957962c4->00c04f12f71b IP 10.40.114.2->10.40.114.50 ICMP 0,0
seq=59228.
->debug ip packet stop
This command shows that the packets are coming into the switch and a reply is being sent by the switch to
the end station.
the end station.
Various combinations of debug ip packet command can be used to find out the incoming traffic. The
combinations possible are as follows:
combinations possible are as follows:
debug ip packet [start] [timeout seconds] [stop] [direction {in | out | all}] [format {header | text | all}]
[output {screen | switchlog}] [board {cmm | ni [1-16] | all | none} [ether-type {arp | ip | hex [hex] |
all}] [ip-address ip_address] [ip-pair [ip1] [ip2]] [protocol {tcp | udp | icmp | igmp | num [integer] |
all}] [show-broadcast {on | off}] show-multicast {on | off}]
[output {screen | switchlog}] [board {cmm | ni [1-16] | all | none} [ether-type {arp | ip | hex [hex] |
all}] [ip-address ip_address] [ip-pair [ip1] [ip2]] [protocol {tcp | udp | icmp | igmp | num [integer] |
all}] [show-broadcast {on | off}] show-multicast {on | off}]
start
Starts an IP packet debug session.
timeout
Sets the duration of the debug session, in seconds. To specify a dura-
tion for the debug session, enter timeout, then enter the session length.
tion for the debug session, enter timeout, then enter the session length.
seconds
The debug session length, in seconds.
stop
Stops IP packet debug session.
direction in
Debugs incoming packets
direction out
Debugs outgoing packets.
direction all
Debugs both incoming and outgoing packets.
format header
Debugs the packet header.