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Lots of frame errors

 
 
808.mark.lee@gmail.com
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      12-27-2005
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.

2. 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

 
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