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slow upload speed isa 2006

Posted on 2009-05-17
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I just updated from ISA 2004 to ISA 2006.  The install went okay but now I am noticing my upload speed has drop by 1/10.  I have disable all filters on the ISA box  but have the same problem.

When I check the interface on the Cisco 2811 I see errors coming from the ISA server. When I bypass the ISA server, the speeds are normal.

Download speed is okay.

Currently running 10 Mbps from my ISP.

Any idea on what can be causing this?
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Question by:jdmb001
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by:Keith Alabaster
ID: 24409228
What errors?
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Author Comment

by:jdmb001
ID: 24411845
Thanks for the reply Keith.   Below are the errors I am seeing.

sh int fastethernet0/1
FastEthernet0/1 is up, line protocol is up
  Hardware is MV96340 Ethernet, address is 001f.6c95.5141 (bia 001f.6c95.5141)
  Description: To ISA
  Internet address is 192.168.20.1/24
  MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
     reliability 220/255, txload 6/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex, 100Mb/s, 100BaseTX/FX
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 00:00:00, output 00:00:00, 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)
  30 second input rate 467000 bits/sec, 239 packets/sec
  30 second output rate 2366000 bits/sec, 292 packets/sec
     88951717 packets input, 1494304903 bytes
     Received 1052 broadcasts, 13194222 runts, 0 giants, 0 throttles
     13352986 input errors, 158759 CRC, 3 frame, 0 overrun, 2 ignored
     0 watchdog


I have already swap the cable between the ISA and the Cisco 2811.
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Keith Alabaster earned 2000 total points
ID: 24414228
Can you do me a favour - clear the counters on that interface then run a sh int each day for the next couple of days? This will show how much is appearing each day or whether it all happens on a particular day etc.

Runts are small packets (less than 64Bytes as i recall) that justy get dropped but they DO indicate a network problem. Use something like Net Monitor or Ethereal/Wireshark - both free - on the ISA Server and watch the traffic from there. Is the ISA nic set to 100Mb full duplex to match the Cisco or set to auto?
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Author Comment

by:jdmb001
ID: 24416112
I have cleared the counter time 16:00,  I will clear them tomorrow again after I capture in the sh int..  The NIC was set to auto but I changed it to 100.  That  jumped  the speed from  0.16mb/s to 2 mb/s  I wll put etheral on the ISA box.  To see what is going on.

Again thanks Keith.
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by:Keith Alabaster
ID: 24416123
Welcome :) Sounds like an improvement already
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Author Comment

by:jdmb001
ID: 24486189
Okay back, the problem turn out to be setting the correct speed on the nic card on the ISA server.  It was set to Auto but when I changed it to full 100 everything seem to work okay.  Thanks for your help.
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by:Keith Alabaster
ID: 24486646
Excellent :)
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