I recently set up a 2611 router to initiate my PPPOE connection to ATT
DSL. I was able to get the PPPOE to connect and everything seemed to
be working how ever after a few days I started to notice that certain
websites were not coming up. My setup consistes of a 2611 router that
is connecting to the internet, internally this router connects to a
2621 router on a 10.1.2.X network which is also acting as a router on
a stick for vlans that i have setup on a 2924 switch in a 192.168.X.X
network. The problem did not seem to be VLAN specific as at least one
PC on each VLAN could get to the sites that were having issues. The
sites that I noticed that were having issues were Windows Update
(would display a "no network connection" error after searching for
updates), Craigs list ( would go to a page can not be displayed when
trying to post adds) Yahoo groups ( could sign on to groups but once
signed on all links would go to a page can not be displayed error)
Credit card sites ( could sign in but all links once signed in would
go to page can not be displayed). I tried troubleshooting this on the
Windows end first by engaging Microsoft support, but we were able to
determine that there was an issue with the network as once I replaced
the 2611 with the linksys that I was using previously everything
worked. Before taking the 2611 down I was able to do a packet sniff
with Ethereal of a succesfull and failed windows update, the only
glaring issue that i saw was that on the failed windows update I was
getting alot of check sum errors which after researching looked like
they were coming from the Gig NIC. Below is the config that I was
using on the 2611, any insite or thoughts on this strange issue would
be appriciated.
2611 Config
=========================
Using 3078 out of 29688 bytes
!
version 12.3
no service pad
service tcp-keepalives-in
service tcp-keepalives-out
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
!
hostname crossbonesEdge
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
ip subnet-zero
no ip source-route
!
!
no ip domain lookup
!
no ip bootp server
ip cef
vpdn enable
!
vpdn-group 1
request-dialin
protocol pppoe
!
!
interface Ethernet0/0
description Connection to Internet
no ip address
no ip redirects
no ip unreachables
full-duplex
pppoe enable
pppoe-client dial-pool-number 1
!
interface Ethernet0/1
description Connection to Crossbones
ip address 10.1.2.253 255.255.255.0
no ip redirects
no ip unreachables
ip nat inside
full-duplex
!
interface Dialer1
ip address negotiated
ip mtu 1492
ip nat outside
encapsulation ppp
dialer pool 1
dialer-group 1
no cdp enable
ppp authentication chap pap callin
ppp chap hostname XXXXX...@sbcglobal.net
ppp chap password 7 XXXXXXXXXX
ppp pap sent-username XXXXX...@sbcglobal.net password 7 XXXXXXXXX
!
router eigrp 100
network 10.1.2.0 0.0.0.255
auto-summary
!
ip nat inside source list 1 interface Dialer1 overload
ip nat inside source static tcp 192.168.7.10 1495 interface Dialer1
1495
ip nat inside source static tcp 192.168.7.15 3389 interface Dialer1
3389
no ip http server
ip classless
ip route 0.0.0.0 0.0.0.0 Dialer1
!
!
logging 192.168.7.16
access-list 1 permit 10.1.2.0 0.0.0.255
access-list 1 permit 192.168.0.0 0.0.255.255
dialer-list 1 protocol ip permit
no cdp run
!
!
snmp-server community public RO
!
line con 0
exec-timeout 15 0
password XXXXXXXXXXXX
logging synchronous
login
length 22
history size 30
line aux 0
exec-timeout 5 0
login
length 22
transport output none
line vty 0 4
exec-timeout 20 30
password XXXXXXXXXXXX
login
length 22
history size 30
!
!
end
