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Dshell Troubleshooting Troubleshooting ARP
page 11-8 OmniSwitch Troubleshooting Guide September 2005
Dshell Troubleshooting
In order to troubleshoot ARP cache make sure all the steps mentioned in the earlier sections have been
taken. Dshell should be used when no more error collection can be done from the CLI and debug CLI.
Note. Dshell commands should only be used by Alcatel personnel or under the direction of Alcatel.
Misuse or failure to follow procedures that use Dshell commands in this guide correctly can cause lengthy
network down time and/or permanent damage to hardware.
According to the architecture of BOP, ARP is processed on the NI. It is never sent to the CMM for
processing. This is done to prevent high CPU utilization on CMM and to have distributed ARP. This
feature was implemented in 5.1.1.R03. Software revision before 5.1.1.R03 processed ARP on the CMM,
CMM synchronized the ARP tables with all of the NIs.
With 5.1.1.R03 and onwards ARP is processed on the NI. In normal scenario ARP table on the CMM
which can be displayed using show arp command in the CLI will be the same as the NI arp table. In case,
an ARP entry is missing in the CMM arp table and debug CLI shows that the ARP is getting into the
switch and a reply is being sent by the NI then NI arp table can be viewed using the NI Debugger.
Load the NI debugger and go to the specific NI in question. One needs to be in the correct slot/slice to
view the routing table on that slice. (For more details about loading the NI debugger and going to the
correct slot/slice, please refer to the NI Debugger section.)
NiDebug>>>ipni_arpShow
NiDebug>>>
Slot 16. NI Arp Table
destination gateway port la_hold expire arp_flags rt_flags refcnt use vlan
10.10.42.159 08:00:20:a8:f0:8a 481 0x0 1948474 0 405 0 0 10
10.11.5.1 00:d0:95:6b:4c:eb 12 0x0 1948e70 0 405 0 0 511
10.40.105.1 00:00:5e:00:01:69 29 0x0 0 8e 405 0 0 105
10.40.105.4 00:d0:95:79:62:eb 124 0x0 1946736 0 405 0 0 105
10.40.106.1 00:00:5e:00:01:6a 29 0x0 0 8e 405 0 0 106
10.40.106.3 00:d0:95:6b:4c:d9 140 0x0 194827b 0 405 0 0 106
10.40.108.1 00:00:5e:00:01:6c 29 0x0 0 8e 405 0 0 108
10.40.108.3 00:d0:95:6b:4c:db 172 0x0 1948272 0 405 0 0 108
10.40.108.4 00:d0:95:79:65:f0 172 0x0 194790a 0 405 0 0 108
10.40.108.129 08:00:20:c0:92:43 172 0x0 19488e3 0 405 0 0 108
10.40.110.1 00:00:5e:00:01:6e 29 0x0 0 8e 405 0 0 110
10.40.110.3 00:d0:95:6b:4c:dd 204 0x0 19484c1 0 405 0 0 110
10.40.110.4 00:d0:95:7c:5b:9b 204 0x0 1946868 0 405 0 0 110
10.40.110.139 08:00:20:b1:1c:49 204 0x0 19484a5 0 405 0 0 110
10.40.110.240 00:00:39:2c:6d:0e 204 0x0 1947a84 0 405 0 0 110
10.40.111.3 00:d0:95:6b:4c:de 33 0x0 1948453 0 405 0 0 111
10.40.111.4 00:d0:95:79:65:67 33 0x0 194672c 0 405 0 0 111
10.40.112.1 00:00:5e:00:01:70 29 0x0 0 8e 405 0 0 112
10.40.112.3 00:d0:95:6b:4c:df 284 0x0 1948273 0 405 0 0 112
10.40.112.4 00:d0:95:79:65:10 284 0x0 194674f 0 405 0 0 112
10.40.117.3 00:d0:95:6b:4c:e3 428 0x0 194827d 0 405 0 0 117
10.40.117.4 00:d0:95:7c:48:59 428 0x0 1947cfc 0 405 0 0 117
10.40.140.1 00:00:5e:00:01:8c 29 0x0 0 8e 405 0 0 140
10.40.140.3 00:d0:95:6b:4c:e5 12 0x0 194827b 0 405 0 0 140
10.40.141.3 00:d0:95:6b:4c:e6 12 0x0 194827b 0 405 0 0 141
10.40.150.1 00:00:5e:00:01:96 29 0x0 0 8e 405 0 0 150
10.40.150.110 00:d0:95:7c:5b:9c 204 0x0 19482ff 0 405 0 1 150
10.40.211.3 00:d0:95:6b:4c:e8 268 0x0 1948273 0 405 0 0 211
10.40.211.4 00:d0:95:79:66:48 268 0x0 194757e 0 405 0 0 211
10.40.212.1 00:00:5e:00:01:d4 29 0x0 0 8e 405 0 0 212