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Lots of frame errors

Hi:

I have a 7204 VXR router. FA0/0 is internal net, fa0/1 is wan backup to dsl, s1 to frame relay isp and s2 load balanced over 2 t1s to co-location servers. Whenever we have a lot of traffic to the co-lo site (either running an app or downloading a large file using Windows XP to 2000/2003 server, I begin to see a lot of frame errors. If I plug in a fluke, I will see 20 - 30% jabber errors (spread evenly among FA0/0 and local machines trying to download data). I have taken ethereal traces and have found a lot of the following errors:

nbss - tcp previous segment lost tcp - tcp dup ack

I seem to be real slow over the load balanced t1's but my internet connection over frame relay seems to be okay.

I have attached my router config. In addition to the slowness, I was wondering about a couple of things.

  1. Does packet load balancing work well in Windows environments where there is a lot of SMB type of traffic and file copies and pastes.

  1. I remember seeing somewhere that on Frame Relay when using subinterfaces, you should not have a IP address on the physical interface. We do have an IP address on the physical serial1 interface. Does this cause a problem?

Router was setup by a consultant and I just started working here. Any help you can provide will be greatly appreciated.

Thank you.

Mark Lee

version 12.1 no service single-slot-reload-enable service timestamps debug uptime service timestamps log uptime no service password-encryption no service dhcp ! hostname xxxxx ! logging rate-limit console 10 except errors enable secret xxxxx enable password xxxxx ! clock timezone HST -10 ip subnet-zero ip cef ! ! no ip finger ip host WORD 198.185.227.1 ip name-server 10.1.1.1 ! call rsvp-sync ! controller T1 2/0 channel-group 0 timeslots 1-24 ! controller T1 2/1 channel-group 0 timeslots 1-24 ! controller T1 2/2 ! controller T1 2/3 ! controller T1 2/4 ! controller T1 2/5 ! controller T1 2/6 ! controller T1 2/7 ! interface Loopback0 ip address 192.168.252.1 255.255.255.255 ! interface FastEthernet0/0 ip address 192.168.1.1 255.255.255.0 duplex auto speed 100 no mop enabled ! interface FastEthernet0/1 ip address 10.2.0.50 255.255.255.252 ip ospf cost 100 duplex auto speed auto ! interface Serial1/0 ip address 198.185.227.1 255.255.255.0 encapsulation frame-relay no ip mroute-cache frame-relay map ip 198.185.227.2 18 broadcast frame-relay map ip 198.185.227.5 19 broadcast frame-relay map ip 198.185.227.6 17 broadcast frame-relay map ip 198.185.227.7 21 broadcast frame-relay map ip 198.185.227.8 23 broadcast frame-relay map ip 198.185.227.9 22 broadcast frame-relay map ip 198.185.227.10 24 broadcast frame-relay lmi-type ansi ! interface Serial1/0.1 point-to-point ip address 10.2.0.30 255.255.255.252 shutdown frame-relay interface-dlci 25 IETF ! interface Serial1/0.2 point-to-point ip address 10.2.0.46 255.255.255.252 ip ospf cost 90 frame-relay interface-dlci 26 IETF ! interface Serial1/1 no ip address shutdown ! interface Serial1/2 no ip address shutdown ! interface Serial1/3 no ip address shutdown ! interface Serial2/0:0 ip address 192.168.250.2 255.255.255.0 ip load-sharing per-packet ! interface Serial2/1:0 ip address 192.168.251.2 255.255.255.0 ip load-sharing per-packet ! interface FastEthernet4/0 no ip address shutdown duplex full ! router ospf 10 log-adjacency-changes redistribute connected subnets redistribute rip subnets network 10.2.0.44 0.0.0.3 area 1 network 10.2.0.48 0.0.0.3 area 1 network 192.168.250.0 0.0.0.255 area 1 network 192.168.251.0 0.0.0.255 area 1 network 192.168.252.1 0.0.0.0 area 1 distribute-list 10 out distribute-list 11 in distance 90 ! router rip version 1 redistribute connected redistribute static network 192.168.1.0 network 198.185.227.0 distance 100 no auto-summary ! ip classless ip route 10.15.23.11 255.255.255.255 10.2.0.45 no ip http server ! access-list 10 permit 192.168.0.0 0.0.255.255 access-list 11 permit 0.0.0.0 access-list 11 permit 10.1.0.0 0.0.255.255 access-list 11 permit 10.15.23.0 0.0.0.255 access-list 11 permit 192.168.0.0 0.0.255.255 snmp-server community xxxxx RW snmp-server host 192.168.1.234 xxxxx ! ! gatekeeper shutdown ! ! line con 0 transport input none line aux 0 line vty 0 4 password xxxxx login line vty 5 15 password xxxxx login ! ntp clock-period 17179955 ntp update-calendar ntp server 131.107.1.10 end

Reply to
808.mark.lee
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Hi:

I have a 7204 VXR router. FA0/0 is internal net, fa0/1 is wan backup to dsl, s1 to frame relay isp and s2 load balanced over 2 t1s to co-location servers. Whenever we have a lot of traffic to the co-lo site (either running an app or downloading a large file using Windows XP to 2000/2003 server, I begin to see a lot of frame errors. If I plug in a fluke, I will see 20 - 30% jabber errors (spread evenly among FA0/0 and local machines trying to download data). I have taken ethereal traces and have found a lot of the following errors:

nbss - tcp previous segment lost tcp - tcp dup ack

I seem to be real slow over the load balanced t1's but my internet connection over frame relay seems to be okay.

I have attached my router config. In addition to the slowness, I was wondering about a couple of things.

  1. Does packet load balancing work well in Windows environments where there is a lot of SMB type of traffic and file copies and pastes.

  1. I remember seeing somewhere that on Frame Relay when using subinterfaces, you should not have a IP address on the physical interface. We do have an IP address on the physical serial1 interface. Does this cause a problem?

Router was setup by a consultant and I just started working here. Any help you can provide will be greatly appreciated.

Thank you.

Mark Lee

version 12.1 no service single-slot-reload-enable service timestamps debug uptime service timestamps log uptime no service password-encryption no service dhcp ! hostname xxxxx ! logging rate-limit console 10 except errors enable secret xxxxx enable password xxxxx ! clock timezone HST -10 ip subnet-zero ip cef ! ! no ip finger ip host WORD 198.185.227.1 ip name-server 10.1.1.1 ! call rsvp-sync ! controller T1 2/0 channel-group 0 timeslots 1-24 ! controller T1 2/1 channel-group 0 timeslots 1-24 ! controller T1 2/2 ! controller T1 2/3 ! controller T1 2/4 ! controller T1 2/5 ! controller T1 2/6 ! controller T1 2/7 ! interface Loopback0 ip address 192.168.252.1 255.255.255.255 ! interface FastEthernet0/0 ip address 192.168.1.1 255.255.255.0 duplex auto speed 100 no mop enabled ! interface FastEthernet0/1 ip address 10.2.0.50 255.255.255.252 ip ospf cost 100 duplex auto speed auto ! interface Serial1/0 ip address 198.185.227.1 255.255.255.0 encapsulation frame-relay no ip mroute-cache frame-relay map ip 198.185.227.2 18 broadcast frame-relay map ip 198.185.227.5 19 broadcast frame-relay map ip 198.185.227.6 17 broadcast frame-relay map ip 198.185.227.7 21 broadcast frame-relay map ip 198.185.227.8 23 broadcast frame-relay map ip 198.185.227.9 22 broadcast frame-relay map ip 198.185.227.10 24 broadcast frame-relay lmi-type ansi ! interface Serial1/0.1 point-to-point ip address 10.2.0.30 255.255.255.252 shutdown frame-relay interface-dlci 25 IETF ! interface Serial1/0.2 point-to-point ip address 10.2.0.46 255.255.255.252 ip ospf cost 90 frame-relay interface-dlci 26 IETF ! interface Serial1/1 no ip address shutdown ! interface Serial1/2 no ip address shutdown ! interface Serial1/3 no ip address shutdown ! interface Serial2/0:0 ip address 192.168.250.2 255.255.255.0 ip load-sharing per-packet ! interface Serial2/1:0 ip address 192.168.251.2 255.255.255.0 ip load-sharing per-packet ! interface FastEthernet4/0 no ip address shutdown duplex full ! router ospf 10 log-adjacency-changes redistribute connected subnets redistribute rip subnets network 10.2.0.44 0.0.0.3 area 1 network 10.2.0.48 0.0.0.3 area 1 network 192.168.250.0 0.0.0.255 area 1 network 192.168.251.0 0.0.0.255 area 1 network 192.168.252.1 0.0.0.0 area 1 distribute-list 10 out distribute-list 11 in distance 90 ! router rip version 1 redistribute connected redistribute static network 192.168.1.0 network 198.185.227.0 distance 100 no auto-summary ! ip classless ip route 10.15.23.11 255.255.255.255 10.2.0.45 no ip http server ! access-list 10 permit 192.168.0.0 0.0.255.255 access-list 11 permit 0.0.0.0 access-list 11 permit 10.1.0.0 0.0.255.255 access-list 11 permit 10.15.23.0 0.0.0.255 access-list 11 permit 192.168.0.0 0.0.255.255 snmp-server community xxxxx RW snmp-server host 192.168.1.234 xxxxx ! ! gatekeeper shutdown ! ! line con 0 transport input none line aux 0 line vty 0 4 password xxxxx login line vty 5 15 password xxxxx login ! ntp clock-period 17179955 ntp update-calendar ntp server 131.107.1.10 end

Reply to
808.mark.lee

Hardcode speed and duplex on the router, all switch ports, and all relevant machines.

Reply to
DERICK WINKWORTH

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