North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: MLPPP Problem with Cisco 7513
Richard, One bug I know of that could possibly be a match is: CSCec00268 Externally found severe defect: Resolved (R) Input drops and * throttles on PPP multilink interface fixed in 12.2(15)T9. The way to verify is to check 'sh int multilink <x>' and see if the interface is under throttle. Router#sh int mu 2 Multilink2 is up, line protocol is up <snip> Received 0 broadcasts, 0 runts, 0 giants, 0* throttles ^-- Here. If that's not it email me offline and I'll help you get it resolved. Thanks, Rodney On Tue, Jan 06, 2004 at 05:30:51PM -0800, Richard J. Sears wrote: > > I am hoping someone can shed some light on an interesting problem we are > having - > > When we set up a customer for MLPPP, things tend to go well for a period > of time. Then - all of a sudden - we will begin to have problems with > our multilink bundles (generally only one at a time) and the only fix is > to reload our 7513. This problem happens on both of our 7513 routers > from time-to-time. Once we reload - the problem will stay gone for as > long as several months, or in the last case only about 12 hours. > > Once we see the problem, it is apparent only in one direction. For > example the customer can push the full capacity of their circuits to us, > but they cannot pull anything above about 300k back to them on a two-T1 > bundle. This is the same every single time we have the problem. > > We have changed multilink bundles, tried different types of switching > and route caching, turning on and off fragmentation - the only thing > that solves the problem is reloading the entire router. We can pull the > T1s from the multilink bundle and each individual T1 works great. No > line errors, no crc errors - nothing. No errors are apparent while in > MLPPP mode either. No throttles or anything similar. > > We have had this problem in the past and it was recommended that we > upgrade the code on our 7513s. We are currently running version > 12.2(13)T5 on both our 7513 as well as the customers router. Upgrading > the code did not solve the problem. I have been unable to locate a Cisco > bug defining this type of problem for any version of their code. > > This particular customer's T1s are both terminated on the same VIP (we > are running DMLP) but are terminated on separate PAs and hence separate > CT3s. We have noticed the problem even with T1 bundles on the exact same > PA and CT3. We are not doing multi-chassis DMLP. dCEF is enable on both > routers, however the problem remains the same even after disable dCEF. > > Here are configs and router info: > > interface Multilink6 > description Eastgate Mall (s2/1/0/8:0 and s2/0/0/12:0) [20291] > ip address 207.158.1.133 255.255.255.252 > no cdp enable > ppp multilink > ppp multilink interleave > multilink-group 6 > > interface Serial2/0/0/12:0 > description Eastgate Mall #2 > no ip address > encapsulation ppp > no fair-queue > ppp multilink > multilink-group 6 > > interface Serial2/1/0/8:0 > description Eastgate Mall #1 > no ip address > encapsulation ppp > no fair-queue > ppp multilink > multilink-group 6 > > > AR04#sh diag 2 > Slot 2: > Physical slot 2, ~physical slot 0xD, logical slot 2, CBus 0 > Microcode Status 0x4 > Master Enable, LED, WCS Loaded > Board is analyzed > Pending I/O Status: None > EEPROM format version 1 > VIP2 R5K controller, HW rev 2.02, board revision D0 > Serial number: 17953368 Part number: 73-2167-05 > Test history: 0x00 RMA number: 00-00-00 > Flags: cisco 7000 board; 7500 compatible > > EEPROM contents (hex): > 0x20: 01 1E 02 02 01 11 F2 58 49 08 77 05 00 00 00 00 > 0x30: 68 00 00 01 00 00 00 00 00 00 00 00 00 00 00 00 > > Slot database information: > Flags: 0x4 Insertion time: 0x41C8 (1d08h ago) > > Controller Memory Size: 32 MBytes DRAM, 4096 KBytes SRAM > > PA Bay 0 Information: > CT3 single wide PA, 1 port > EEPROM format version 1 > HW rev 1.00, Board revision A0 > Serial number: 17814822 Part number: 73-3037-01 > > PA Bay 1 Information: > CT3 single wide PA, 1 port > EEPROM format version 1 > HW rev 1.00, Board revision A0 > Serial number: 09725065 Part number: 73-3037-01 > > --Boot log begin-- > > Cisco Internetwork Operating System Software > IOS (tm) VIP Software (SVIP-DW-M), Version 12.2(13)T5, RELEASE SOFTWARE (fc1) > TAC Support: http://www.cisco.com/tac > Copyright (c) 1986-2003 by cisco Systems, Inc. > Compiled Wed 28-May-03 21:57 by nmasa > Image text-base: 0x60010930, data-base: 0x604C0000 > > > > AR04#sh ver > Cisco Internetwork Operating System Software > IOS (tm) RSP Software (RSP-JSV-M), Version 12.2(13)T5, RELEASE SOFTWARE (fc1) > TAC Support: http://www.cisco.com/tac > Copyright (c) 1986-2003 by cisco Systems, Inc. > Compiled Wed 28-May-03 22:00 by nmasa > Image text-base: 0x60010948, data-base: 0x61F0A000 > > ROM: System Bootstrap, Version 11.1(8)CA1, EARLY DEPLOYMENT RELEASE SOFTWARE (fc1) > > AR04 uptime is 1 day, 8 hours, 24 minutes > System returned to ROM by reload at 09:45:48 UTC Tue Dec 23 2003 > System image file is "slot0:rsp-jsv-mz.122-13.T5.bin" > > cisco RSP4 (R5000) processor with 262144K/2072K bytes of memory. > R5000 CPU at 200Mhz, Implementation 35, Rev 2.1, 512KB L2 Cache > Last reset from power-on > G.703/E1 software, Version 1.0. > G.703/JT2 software, Version 1.0. > X.25 software, Version 3.0.0. > SuperLAT software (copyright 1990 by Meridian Technology Corp). > Bridging software. > TN3270 Emulation software. > Primary Rate ISDN software, Version 1.1. > Chassis Interface. > 3 VIP2 R5K controllers (2 FastEthernet)(6 Channelized T3). > 2 FastEthernet/IEEE 802.3 interface(s) > 168 Serial network interface(s) > 6 Channelized T3 port(s) > 123K bytes of non-volatile configuration memory. > > 20480K bytes of Flash PCMCIA card at slot 0 (Sector size 128K). > 8192K bytes of Flash internal SIMM (Sector size 256K). > > Slave in slot 7 is running Cisco Internetwork Operating System Software > IOS (tm) RSP Software (RSP-DW-M), Version 12.2(13)T5, RELEASE SOFTWARE (fc1) > TAC Support: http://www.cisco.com/tac > Copyright (c) 1986-2003 by cisco Systems, Inc. > Compiled Wed 28-May-03 22:33 by nmasa > Slave: Loaded from system > Slave: cisco RSP4 (R5000) processor with 262144K bytes of memory. > > Configuration register is 0x2102 > > > > > > Any help would be greatly appreciated. > > > ****************************************** > Richard J. Sears > Vice President > American Digital Network > ---------------------------------------------------- > [email protected] > http://www.adnc.com > ---------------------------------------------------- > 858.576.4272 - Phone > 858.427.2401 - Fax > ---------------------------------------------------- > > I fly because it releases my mind > from the tyranny of petty things . . > > > "Work like you don't need the money, love like you've > never been hurt and dance like you do when nobody's > watching."
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