Isn't weighted fair queueing generally a bad idea on a LAN interface? Chuck Church Lead Design Engineer CCIE #8776, MCNE, MCSE Netco Government Services - Design & Implementation Team 1210 N. Parker Rd. Greenville, SC 29609 Home office: 864-335-9473 Cell: 703-819-3495 cchurch@netcogov.com PGP key: http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x4371A48D -----Original Message----- From: owner-nanog@merit.edu [mailto:owner-nanog@merit.edu] On Behalf Of Gyorfy, Shawn Sent: Tuesday, October 26, 2004 10:49 AM To: 'jkreger@lwolenczak.net' Cc: nanog@merit.edu Subject: RE: [Insight?] OutPut Drops Cisco 7206VXR Yeah - we have traffic shaping: policy-map Outbound-Transmission-To-Core (We have 10) class Expedited-Forwarding-To-Core priority percent 50 class Hanover_13364_14025_37272-TS-To-Core shape average 1536000 192000 15000 class Queller_3266_3268_30989-TS-To-Core shape average 700000 87500 15000 . . . (10) FastEthernet0/0 is up, line protocol is up Hardware is DEC21140A, address is 0001.636e.1c00 (bia 0001.636e.1c00) Description: Connected to Extreme Summit48 Internet address is MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec, reliability 255/255, txload 12/255, rxload 3/255 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 00:00:21, output 00:00:00, output hang never Last clearing of "show interface" counters 00:37:12 Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 5397 Queueing strategy: weighted fair Output queue: 0/1000/64/0 (size/max total/threshold/drops) Conversations 0/82/256 (active/max active/max total) Reserved Conversations 0/0 (allocated/max allocated) Available Bandwidth 25000 kilobits/sec 5 minute input rate 1505000 bits/sec, 979 packets/sec 5 minute output rate 5084000 bits/sec, 1590 packets/sec 2028319 packets input, 434456929 bytes Received 3 broadcasts, 0 runts, 0 giants, 0 throttles 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored 0 watchdog 0 input packets with dribble condition detected 3453733 packets output, 1359654191 bytes, 0 underruns 0 output errors, 0 collisions, 0 interface resets 0 babbles, 0 late collision, 0 deferred 0 lost carrier, 0 no carrier 0 output buffer failures, 0 output buffers swapped out Serial2/0 is up, line protocol is up Hardware is M1T-T3+ pa Description: ny-0200 V#51HFGL605916 (DS3 to 39 Broadway POP) Internet address is MTU 4470 bytes, BW 44210 Kbit, DLY 200 usec, reliability 255/255, txload 8/255, rxload 29/255 Encapsulation PPP, LCP Open Open: CDPCP, IPCP, crc 16, loopback not set Keepalive set (10 sec) Restart-Delay is 0 secs Last input 00:00:00, output 00:00:00, output hang never Last clearing of "show interface" counters 00:37:49 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 0/10/256 (active/max active/max total) Reserved Conversations 0/0 (allocated/max allocated) Available Bandwidth 11052 kilobits/sec 5 minute input rate 5029000 bits/sec, 1584 packets/sec 5 minute output rate 1437000 bits/sec, 966 packets/sec 3460149 packets input, 1351120603 bytes, 0 no buffer Received 0 broadcasts, 0 runts, 0 giants, 0 throttles 0 parity 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort 2005303 packets output, 418156501 bytes, 0 underruns 0 output errors, 0 applique, 0 interface resets 0 output buffer failures, 0 output buffers swapped out 0 carrier transitions rxLOS inactive, rxLOF inactive, rxAIS inactive txAIS inactive, rxRAI inactive, txRAI inactive -----Original Message----- From: jkreger@lwolenczak.net [mailto:jkreger@lwolenczak.net] Sent: Tuesday, October 26, 2004 10:55 AM To: Gyorfy, Shawn Subject: Re: [Insight?] OutPut Drops Cisco 7206VXR Do you have any rate limiting on the Ethernet interface? The bus error.. I would say let cisco just replace your gear... that dosen't sound good. How is the bandwidth usage soo different? That dosen't sound right.... -Justin On Tue, 26 Oct 2004, Gyorfy, Shawn wrote:

What's up all,

I have a question, maybe some have experienced this before- let me

picture for you first - We are running VoIP- customer's are experiencing static.

I have a DS3 going for a Cisco 10k router to a Cisco 7206VXR M2T-T3+

paint the pa

Interface. As of right now, the current usage is about 5.5Mbps with an input rate of about 1425pps and output rate of 756.

The Fast Ethernet is connected to an Extreme Switch. The FastE's usage right now is about 20Mbps with an input rate of 868pps and an output of 1541pps.

On the FastE - we are seeing Output drops. They were at a constant interval, when we were running IOS c7200-p-mz.123-9a. As per cisco, we upgraded the IOS to c7200-p-mz.123-10 because of a possible buffer leak. Rather than just upgrading the IOS on the current box, we swapped it out to a new box and still recv output drops and Now the puppy decides to reboot every 15 minutes returning a, "System returned to ROM by bus error at PC 0x60132C44, address 0xE16E2CD at 13:38:47 UTC Tue Oct 26 2004"

Questions: (a) What would be causing the output errors - can't the processor and memory handle that? (b) what is that bus error?

Thanks all,

shawn.