I have a 1602 router supporting a customer site with a fractional t1 (128K).
The LEC has indicated the router is switching back and forth from ESF to AMI framing. There are lots of errors showing up on the interface counters. Everytime I have checked the interface it is showing ESF (what it's suppose to be). The default for the router is ESF but I figured I would go ahead and force it using the service-module t1 framing esf option along with service-module t1 linecode b8zs.
I can enter the commands with no errors but when I exit interface config mode and show run the modifications are not there. Below is the relevant section:
interface Serial1
no ip address
encapsulation frame-relay
service-module t1 timeslots 1-24
frame-relay lmi-type ansi
!
interface Serial1.1 point-to-point
description 128K to Waukee
ip unnumbered Ethernet0
frame-relay interface-dlci 18
!
I tried having someone onsite connect through a LAN port, shut the interface down, make the changes... but that didn't work either.
Anyone know why I cannot change these parameters?
Thanks,
Matt
