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New Member

Cisco 2980 Switch sh port result

Here is an output for a sh port on my switch for one of the ports I think is having problems (Collision).

Port Align-Err FCS-Err Xmit-Err Rcv-Err UnderSize

----- ---------- ---------- ---------- ---------- ---------

2/40 - 0 17961 216777 216598

Port Single-Col Multi-Coll Late-Coll Excess-Col Carri-Sen Runts Giants

----- ---------- ---------- ---------- ---------- --------- --------- ---------

2/40 97594 95829 0 0 0 179 0

Does this indicate any problem on the LAN or on the switch ?

Any input is highly appreciated.

Thanks

4 REPLIES
Cisco Employee

Re: Cisco 2980 Switch sh port result

What connects to this port? Is it a half duplex port? Check to see if there is an duplex mismatch. The following page should help as well

http://www.cisco.com/warp/customer/473/53.shtml#datalink

New Member

Re: Cisco 2980 Switch sh port result

it is an ethernet 10M half duplex wouter (gateway for the LAN), but it is configured for speed 10 half duplex to match the switch port which has :

Console> (enable) sh port 2/40

Port Name Status Vlan Level Duplex Speed Type

----- ------------------ ---------- ---------- ------ ------ ----- ------------

2/40 connected 1 normal half 10 10/100BaseTX

Thanks

Cisco Employee

Re: Cisco 2980 Switch sh port result

Single/multiple Collisions are normal in half duplex environment. You also see quite a few Xmit-Err and Rcv-Err which are an indication of excessive input and output rates of traffic. You might want to consider migrating to a 100/full duplex connection

New Member

Re: Cisco 2980 Switch sh port result

Thanks for your help. I am researching the meaning for the sh port :

Port Single-Col Multi-Coll Late-Coll Excess-Col Carri-Sen Runts Giants AND Port Align-Err FCS-Err Xmit-Err Rcv-Err UnderSize.

Example : Single-Col , Multi-Coll, Excess-Col

But I do not know all of them. Can I use this info from the switch as a solid fact that there is a problem with the LAN caused by the 10 half duplex setting on the router which is connected to the switch. I have cleared the counters on the switch and here is the output of sh port 2/40 :

what is the following : Runts , UnderSize

Console> (enable) sh port 2/40

Port Name Status Vlan Level Duplex Speed Type

----- ------------------ ---------- ---------- ------ ------ ----- ------------

2/40 connected 1 normal half 10 10/100BaseTX

Port AuxiliaryVlan AuxVlan-Status InlinePowered PowerAllocated

Admin Oper Detected mWatt mA @51V

----- ------------- -------------- ----- ------ -------- ----- --------

2/40 none none - - - - -

Port Security Violation Shutdown-Time Age-Time Max-Addr Trap IfIndex

----- -------- --------- ------------- -------- -------- -------- -------

2/40 disabled shutdown 0 0 1 disabled 48

Port Num-Addr Secure-Src-Addr Age-Left Last-Src-Addr Shutdown/Time-Left

----- -------- ----------------- -------- ----------------- ------------------

2/40 0 - - - - -

Port Status Channel Admin Ch

Mode Group Id

----- ---------- -------------------- ----- -----

2/40 connected auto silent 187 0

Port Align-Err FCS-Err Xmit-Err Rcv-Err UnderSize

----- ---------- ---------- ---------- ---------- ---------

2/40 - 0 18829 230665 230461

Port Single-Col Multi-Coll Late-Coll Excess-Col Carri-Sen Runts Giants

----- ---------- ---------- ---------- ---------- --------- --------- ---------

2/40 105430 101833 0 0 0 204 0

Last-Time-Cleared

--------------------------

Thu Jan 23 2002, 06:42:33

Console> (enable)

Thanks again for your support in this

Shareef

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