I've contacted the cisco TAC.
The CE write " is this router connected to the switch on the ethernet side.
If
it is then can you verify if the switch has good entries for the mac addreses
of the PC's. Also you can run "debug arp" on the router and you will see that
the router is sending arp request but never getting any replies back"
Regarding the WFQ, this is because I had problems last week with the same
router and I opened another case, the CE suggested as workaround this
queueing
method and some route to null0...
We are still investigating the problem, collision and deferred counters
have
been increasing for all the night, when no traffic should passing through the
lan
Teresa
----- Original Message -----
From: Paul Werner
To: [EMAIL PROTECTED] ; [EMAIL PROTECTED] ; [EMAIL PROTECTED]
Sent: Friday, August 24, 2001 1:29 AM
Subject: Re: Subject: Re: sh arp [7:17012]
Teresa,
Here is what CCO has to say about the error you have:
Error Message: %AMDP2_FE-3-UNDERFLO Unit [dec], underflow error
Explanation:
The Ethernet hardware is requesting data faster than the system
can supply it. This should never happen unless a serious
malfunction has occurred.
Recommended Action:
Contact Cisco Systems.
Before you go about contacting Cisco TAC, I am curious about
one item in your configuration. Why is your Ethernet interface
set up with weighted fair queueing? WFQ is designed for low
speed interfaces (T1/E1 and below). Also, the default queueing
method for this interface is FIFO (First in, First out). You
may want to try this and see if it helps:
grp_ge#conf t
grp_ge(config)#int e0/1
grp_ge#(config-if)#no fair-queue
grp_ge#(config-if)#end
grp_ge#
Additionally, you may want to take a peek at this article; note
the emphasis on queueing on **WAN** links/low speed links(watch
wrap):
http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/
121cgcr/qos_c/qcprt2/qcdwfq.htm
HTH,
Paul Werner
> Subject: Re: sh arp [7:17012]
>
> It didn't ping successfully.
> In the sho log I see the following line:
> UTC: %AMDP2_FE-3-UNDERFLO: Ethernet0/1 transmit error
>
> I reloaded the router and now I can see all the MAC address
in the arp
> cache.
> By the way something is going wrong...
>
> see this two sh int output
> grp_ge#sh int eth0/1
> Ethernet0/1 is up, line protocol is up
> Hardware is AmdP2, address is 00b0.6469.4641 (bia
00b0.6469.4641)
> Description: "LAN Uffici Genova"
> Internet address is 172.17.1.33/24
> MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec,
> reliability 255/255, txload 1/255, rxload 58/255
> Encapsulation ARPA, loopback not set
> Keepalive set (10 sec)
> ARP type: ARPA, ARP Timeout 04:00:00
> Last input 00:00:01, output 00:00:00, output hang never
> Last clearing of "show interface" counters 00:58:52
> Input queue: 0/75/0/0 (size/max/drops/flushes); Total
output drops: 0
> Queueing strategy: weighted fair
> Output queue: 0/1000/64/0 (size/max total/threshold/drops)
> Conversations 0/2/256 (active/max active/max total)
> Reserved Conversations 0/0 (allocated/max allocated)
> Available Bandwidth 7500 kilobits/sec
> 30 second input rate 2286000 bits/sec, 4703 packets/sec
> 30 second output rate 8000 bits/sec, 13 packets/sec
> 16568680 packets input, 1006250867 bytes, 0 no buffer
> Received 2701 broadcasts, 0 runts, 0 giants, 0 throttles
> 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
> 0 input packets with dribble condition detected
> 41880 packets output, 20367226 bytes, 0 underruns
(1268/2497/0)
> 0 output errors, 3765 collisions, 0 interface resets
> 0 babbles, 0 late collision, 6301 deferred
> 0 lost carrier, 0 no carrier
> 0 output buffer failures, 0 output buffers swapped out
>
> and after few seconds
>
> grp_ge#sh int eth0/1
> Ethernet0/1 is up, line protocol is up
> Hardware is AmdP2, address is 00b0.6469.4641 (bia
00b0.6469.4641)
> Description: "LAN Uffici Genova"
> Internet address is 172.17.1.33/24
> MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec,
> reliability 255/255, txload 1/255, rxload 58/255
> Encapsulation ARPA, loopback not set
> Keepalive set (10 sec)
> ARP type: ARPA, ARP Timeout 04:00:00
> Last input 00:00:01, output 00:00:00, output hang never
> Last clearing of "show interface" counters 00:59:13
> Input queue: 1/75/0/0 (size/max/drops/flushes); Total
output drops: 0
> Queueing strategy: weighted fair
> Output queue: 0/1000/64/0 (size/max total/threshold/drops)
> Conversations 0/2/256 (active/max active/max total)
> Reserved Conversations 0/0 (allocated/max allocated)
> Available Bandwidth 7500 kilobits/sec
> 30 second input rate 2282000 bits/sec, 4695 packets/sec
> 30 second output rate 4000 bits/sec, 8 packets/sec
> 16670090 packets input, 1012418296 bytes, 0 no buffer
> Received 2716 broadcasts, 0 runts, 0 giants, 0 throttles
> 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
> 0 input packets with dribble condition detected
> 42038 packets output, 20377608 bytes, 0 underruns
(1268/2501/0)
> 0 output errors, 3769 collisions, 0 interface resets
> 0 babbles, 0 late collision, 6318 deferred
> 0 lost carrier, 0 no carrier
> 0 output buffer failures, 0 output buffers swapped out
>
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