Cisco Support Community
Showing results for 
Search instead for 
Did you mean: 
You may experience some slow load times, errors, and slight inconsistencies. We ask for your patience as we finalize the launch. Thank you.

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. If you'd prefer to explore, try our test area to get started. And see here for current known issues.

New Member

Packet latency on Catalyst L3.

Hello Community,

I have just introduced a L3 switch into my network. this switch does the routing for 4 different subnets via vlans. I have been experiencine lots of packet latency and loss. It is not contstant but every few minutes I see lots of packets ranging from 150ms to 900ms.

I have checked the ports and the txload and the rxload. Below is the output of my command: show interface FastEthernet 0/2

I  have also inserted a picture of my Dell Powerconnect switch that is  hooked up to my Catalyst. Is there something special I should do to  connect the two. I noticed that my catalyst is using Full-Duplex 100Mb/s  and my switch is using a 1000M, but shoudl that 1000M downgrade to  100M? My servers are mostly 100M too.

#show interface fastethernet 0/2

FastEthernet0/2 is up, line protocol is up (connected)

  Hardware is Fast Ethernet, address is 0007.0e76.0c84 (bia 0007.0e76.0c84)

  MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,

     reliability 255/255, txload 90/255, rxload 40/255

  Encapsulation ARPA, loopback not set

  Keepalive set (10 sec)

  Full-duplex, 100Mb/s, media type is 10/100BaseTX

  input flow-control is off, output flow-control is unsupported

  ARP type: ARPA, ARP Timeout 04:00:00

  Last input 00:00:01, output 00:00:05, output hang never

  Last clearing of "show interface" counters never

  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0

  Queueing strategy: fifo

  Output queue: 0/40 (size/max)

  5 minute input rate 15735000 bits/sec, 4477 packets/sec

  5 minute output rate 35624000 bits/sec, 3555 packets/sec

     169356269 packets input, 76279088303 bytes, 0 no buffer

     Received 53247 broadcasts (0 multicasts)

     0 runts, 0 giants, 0 throttles

     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored

     0 watchdog, 36940 multicast, 0 pause input

     0 input packets with dribble condition detected

     132627013 packets output, 160530213511 bytes, 0 underruns

     0 output errors, 0 collisions, 1 interface resets

     0 babbles, 0 late collision, 0 deferred

     0 lost carrier, 0 no carrier, 0 PAUSE output

     0 output buffer failures, 0 output buffers swapped out


  • WAN Routing and Switching