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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

port.jpg

  • WAN Routing and Switching
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