04-24-2013 06:30 PM - edited 03-04-2019 07:42 PM
I recently purchased a UC520W for use at home to replace an 877W, would like it to do all the front-end stuff, NAT, firewall, PPPoE, voice. Have installed a 1801 in front of it to bridge ADSL to Ethernet (almost), but having some issues.
1801 config:
-----------
no ip routing
!
interface ATM0
description OUTSIDE
no ip address
no ip route-cache
no atm ilmi-keepalive
pvc 8/3
vc-hold-queue 1024
encapsulation aal5snap
exit
bridge-group 1
no shut
exit
!
interface FastEthernet0
description INSIDE
no ip address
no ip route-cache
speed 100
full-duplex
bridge-group 1
no shut
exit
!
bridge 1 protocol ieee
The UC520W is doing the PPPoE negotiation fine, so the 1801 is bridging (I've tried an 877W as well), I can ping out from the UC520 and attached PCs OK as well. But when it comes to email and web surfing....no joy. Replacing the 1801 with a dumb domestic modem/router in bridge mode works without issue.
Have tried bridge irb (both enabled/disabled) and also ip routing (both enabled/disabled), no change.
Why am I getting only a partial connection? Any thoughts welcome....and just using the domestic modem/router is the ultimate fall back solution, but I'd like to work out where its failing if I can.
Solved! Go to Solution.
04-29-2013 12:33 AM
Please, check you MTU in all the links. I think the problem could be the MTU in some interface.
Regards.
04-29-2013 12:33 AM
Please, check you MTU in all the links. I think the problem could be the MTU in some interface.
Regards.
05-01-2013 03:13 PM
Looks to have been an MTU problem (which was on my to-do list [but forgotten]), configured for 1452 on both the ATM and FastEthernet interfaces on the 1801 and FastEthernet on the UC520, all OK for the past 24 hours.
Thanks for the assist!
04-29-2013 07:29 AM
You will have better results by using a cheap modem like the default ISP one, as bridge.
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