1. Show interface counters protocol status
-Description
This command is an unpublished Cisco command that is available in ver 12.2 and above and shows us the interface and protocol status. As you can see below, each interface is listed with its corresponding list or running protocols.
-Uses
This command can be used to verify that interfaces are participating in the protocols you require them in. A good example would be Spanning Tree. If you have a protocol not participating in Spanning Tree “Fa0/7 below” it could be putting the vlan it participates in at risk for a loop. In this case, the port is not connected.
CA-A31-43W77-36#Show interfaces counters protocol status
Protocols allocated:
Vlan1: Other, IP
Vlan112: Other, IP, ARP
Vlan163: Other, IP, ARP
Vlan251: Other, IP, ARP
FastEthernet0/1: Other, IP
FastEthernet0/2: Other, IP, Spanning Tree
FastEthernet0/3: Other, IP, Spanning Tree
FastEthernet0/4: Other, IP, Spanning Tree
FastEthernet0/5: Other, IP, Spanning Tree
FastEthernet0/6: Other, IP, Spanning Tree
FastEthernet0/7: Other, IP
FastEthernet0/8: Other, IP, Spanning Tree
FastEthernet0/9: Other, IP, Spanning Tree
SG2#show interface counters protocol status
Protocols allocated:
FastEthernet0/0: Other, IP
FastEthernet1/0: Other, IP, ARP, CDP
FastEthernet1/1: Other, IP, ARP, CDP
Loopback1: Other, IP
2. Show interface accounting
-Description
This command gives you a basic break down of each interface and the associated counters for each; broken down by protocol.
-Use
This command gives you the ability to check the detailed information for each interface and allows you to see packets incrementing on a per-protocol basis.
SG2#show interface accounting
Interface FastEthernet0/0 is disabled
FastEthernet1/0
Protocol Pkts In Chars In Pkts Out Chars Out
Other 2 154 139 8340
IP 527 38100 572 45474
ARP 1 60 5 300
CDP 23 7705 24 7992
FastEthernet1/1
Protocol Pkts In Chars In Pkts Out Chars Out
Other 2 154 139 8340
IP 0 0 191 15942
ARP 1 60 5 300
CDP 23 7705 24 7992
Loopback1
Protocol Pkts In Chars In Pkts Out Chars Out
No traffic sent or received on this interface.
Loopback15
Protocol Pkts In Chars In Pkts Out Chars Out
IP 2 104 2 104
3. Show interfaces summary
-Description and Use
This command allows you to see if there are any dropped packets on your interfaces all at one time. It can be used when troubleshooting a link that is exceeding its available bandwidth or something along those lines.
CA-PR-35C51-R1#sho int sum
*: interface is up
IHQ: pkts in input hold queue IQD: pkts dropped from input queue
OHQ: pkts in output hold queue OQD: pkts dropped from output queue
RXBS: rx rate (bits/sec) RXPS: rx rate (pkts/sec)
TXBS: tx rate (bits/sec) TXPS: tx rate (pkts/sec)
TRTL: throttle count
Interface IHQ IQD OHQ OQD RXBS RXPS TXBS TXPS TRTL
———————————————————————
Vlan1 0 0 0 0 0 0 0 0 0
* Vlan5 0 0 0 0 0 0 0 0 0
* Vlan6 1 0 0 0 2000 1 0 0 0
Vlan13 0 0 0 0 0 0 0 0 0
* Vlan15 0 5 0 0 0 0 0 0 1
* Vlan25 0 0 0 0 0 0 0 0 0
* Vlan26 0 0 0 0 0 0 0 0 0
* Vlan27 0 0 0 0 1000 1 8000 16 0
* Vlan32 0 25 0 0 114000 188 0 0 1
* Vlan37 0 0 0 0 0 0 0 0 0
* Vlan39 0 0 0 0 0 0 0 0 0
* Vlan46 0 17 0 0 6000 9 2000 2 1
* Vlan50 0 17 0 0 682000 166 337000 69 1
4. Show interface counters
Description – this command gives you the packet count for each interface and it’s associated IN and OUT count.
Use – This can allow you to look incrementing packets for the entire device without having to go into each interface on its own. It is also nice because it breaks the packets down by type. So if you wanted to check and make sure you are receiving Multicast packets on ports 2, 4, 5 you can watch them all at once.
CA-A31-36#sho int counters
Port InOctets InUcastPkts InMcastPkts InBcastPkts
Fa0/1 0 0 0 0
Fa0/2 9554114 90717 23 1054
Fa0/3 4344241109 41095442 0 138
Fa0/4 2597053412 28027665 87 93379
Fa0/5 5027141741 38715811 62 107699
Port OutOctets OutUcastPkts OutMcastPkts OutBcastPkts
Fa0/1 0 0 0 0
Fa0/2 203190126 156315 57080 7738
Fa0/3 41398983291 303765483 32142064 35229531
Fa0/4 44024460395 69378044 34255762 7820553
Fa0/5 405998091547 2215247117 34245798 6254554
Filed under: Uncategorized
It’s important to know that IP Accounting has to be enabled on a per interface basis. Also, it causes performance degradation as it requires processing in the CPU. A good thing about Accounting is that it can be configured to report on ACL access violations.
Great overview, thx…