Thanks for clearing broadcast issue, so I do need
broadcast on Ethernet interface. I do get quite few
input errors and everything is seems okay on the switch
connected including duplex, speed settings so not sure
why it's getting CRCs and input errors.
For ping latency to ISDN sites issue, I gone through
talking TAC and this newsgroup but no luck yet Cisco is offering new
router but I do not think it's router. We have T1 going out to
ISDN sites using Cisco 7505. weird thing is ping latency goes
in circle meaning it's not only one site but to all sites one by one..
Thanks
Inamul
Here is sh int from router
Serial2/1:23 is up, line protocol is up (spoofing)
Hardware is cxBus T1
MTU 1500 bytes, BW 64 Kbit, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation PPP, loopback not set
DTR is pulsed for 1 seconds on reset
Last input 00:00:06, output 00:00:06, output hang never
Last clearing of "show interface" counters 2d18h
Queueing strategy: fifo
Output queue 0/40, 0 drops; input queue 0/75, 0 drops
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
28070 packets input, 133292 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
28153 packets output, 194170 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions no alarm present
Timeslot(s) Used:24, subrate: 64Kb/s, transmit delay is 0 flags
Transmit queue length 23
FastEthernet3/0/0 is up, line protocol is up
Hardware is cyBus FastEthernet Interface, address is 00e0.fea0.ec60 (bia
00e0.
fea0.ec60)
Internet address is 204.239.50.3/24
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, 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 2d18h
Queueing strategy: fifo
Output queue 0/40, 0 drops; input queue 0/75, 492 drops
5 minute input rate 41000 bits/sec, 36 packets/sec
5 minute output rate 41000 bits/sec, 38 packets/sec
4679482 packets input, 878944627 bytes, 0 no buffer
Received 425728 broadcasts, 0 runts, 0 giants, 34 throttles
1026 input errors, 1026 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog
0 input packets with dribble condition detected
5871168 packets output, 1153644205 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
--More--
-----Original Message-----
From: Dennis R [mailto:[EMAIL PROTECTED]]
Sent: Saturday, May 26, 2001 4:41 AM
To: [EMAIL PROTECTED]
Subject: Re: Lots of brodacast packets [7:6018]
>I am getting lot of broadcast packets on FastEthernet interface when I >do
>sh interface on cisco 7505.
What does, "Lots," mean? Broadcasts are part of life in a network, cf. ARP,
GNS, SAP, RIP updates, etc.
>I also get "input errors" on that interface
What percentage of your input packets is it? Are they collisions (normal in
an unswitched environment), CRC's, or ?? You may want to check your cabling,
and your speed/duplex settings if the router is plugged into a switch.
>and big ping (up to 1200ms) latency to isdn sites.
Could be caused by many, many things. It's unlikely this has anything to do
with your ethernet interface. You might start by looking for overutilized
circuits causing routers to drop packets from their output queues.
>What to expect if I turn off these broadcasts?
ARP won't work, therefore TCP/IP won't work.
>Do I need receive broadcast packets on interface?
Yes.
HTH,
doctorcisco
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