I tried both straight rate-limiting and traffic policing with no change in symptoms.
On 2/15/08, Paolo Lucente <[EMAIL PROTECTED]> wrote: > > Hi Joe, > > it might be you need to apply some outbound shaping onto the interface > facing > the Internet due to the difference between the access rate (100Mbps) and > the > CIR (15Mbps). This could explain why degraded throughput is experienced > only > upstream. I can't really imagine it could be a CPU-related issue, but all > in > all it's worth checking it. > > Cheers, > > Paolo > > > > On Fri, Feb 15, 2008 at 02:59:55PM -0600, Joe Freeman wrote: > > Folks- > > > > I have a situation in which a customer has a 2811 router connected to an > > Ethernet over SONET pipe from me onto which he subscribes 15M of > Internet. > > The SONET portion of the pipe currently has 11 VT1.5's cross-connected. > This > > customer is seeing asymmetric performance on the link in that his upload > > speeds are significantly lower than the download speeds. > > > > Given that there is no congestion on the network, plenty of bandwidth is > > available, and no significant packet/frame loss errors are seen at any > > point, including on the SONET ADM boxes, I'm sort of at a loss. Further, > I > > can plug my laptop into this port with 1323 opts, nagle, window scaling, > and > > a large MAX window size and test absolutely fine across the circuit. I > plug > > the same laptop into the lan side of his router (Fa0/1, below) and I see > the > > significant drop of which he's complaining. > > > > I've also verified the speed/duplex settings are appropriate and are > working > > correctly. One other thing I've noticed is that as I increase bandwidth > > across the SONET ring, the disconnect between upload and download speeds > > appears to grow on an almost log scale. > > > > Anyone have any thoughts or tips on this? > > > > Thanks- > > Joe > > > > R1#sho ver > > Cisco IOS Software, 2800 Software (C2800NM-IPBASE-M), Version 12.4(3d), > > RELEASE SOFTWARE (fc3) > > Technical Support: http://www.cisco.com/techsupport > > Copyright (c) 1986-2006 by Cisco Systems, Inc. > > Compiled Wed 19-Apr-06 09:18 by alnguyen > > > > ROM: System Bootstrap, Version 12.4(1r) [hqluong 1r], RELEASE SOFTWARE > (fc1) > > > > nettech uptime is 1 hour, 23 minutes > > System returned to ROM by power-on > > System image file is "flash:c2800nm-ipbase-mz.124-3d.bin" > > > > Cisco 2811 (revision 53.51) with 251904K/10240K bytes of memory. > > Processor board ID FTX1027A1HS > > 6 FastEthernet interfaces > > DRAM configuration is 64 bits wide with parity enabled. > > 239K bytes of non-volatile configuration memory. > > 62720K bytes of ATA CompactFlash (Read/Write) > > > > Configuration register is 0x2102 > > > > R1#sho run > > Building configuration... > > > > Current configuration : 1115 bytes > > ! > > version 12.4 > > service timestamps debug datetime msec > > service timestamps log datetime msec > > no service password-encryption > > ! > > hostname R1 > > ! > > boot-start-marker > > boot-end-marker > > ! > > ! > > no aaa new-model > > ! > > resource policy > > ! > > ip subnet-zero > > ! > > ! > > ip cef > > ! > > ! > > no ip domain lookup > > ip domain name R1.net > > ! > > ! > > ! > > ! > > interface FastEthernet0/0 > > description to Internet > > ip address 66.211.51.10 255.255.255.252 > > ip nat outside > > load-interval 30 > > duplex auto > > speed auto > > ! > > interface FastEthernet0/1 > > description To LAN > > ip address 192.168.1.1 255.255.255.0 > > ip nat inside > > duplex auto > > speed auto > > ! > > interface FastEthernet0/0/0 > > ! > > interface FastEthernet0/0/1 > > ! > > interface FastEthernet0/0/2 > > ! > > interface FastEthernet0/0/3 > > ! > > interface Vlan1 > > no ip address > > ! > > ip classless > > ip route 0.0.0.0 0.0.0.0 66.211.51.9 > > ! > > no ip http server > > ip nat inside source static 192.168.1.2 interface FastEthernet0/0 > > ! > > ! > > control-plane > > ! > > banner motd ^C Authorized personel only, please. ^C > > ! > > line con 0 > > line aux 0 > > line vty 0 4 > > password cisco > > login > > ! > > scheduler allocate 20000 1000 > > ! > > end > > _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
