08-28-2006 07:11 PM - edited 03-03-2019 01:47 PM
I've got a Cisco 3640 with 128M/32M RAM. There are 2x NM-2FE2W and 4x
WIC-1DSU-T1 cards installed. The configurations for the interfaces are
below. I have 4 point-to-point T1s coming into this router. 3 T1s are
coming from another 3640 at one office (A) and the other T1 is coming
from a 2514 at another office (B). I control all 3 routers.
I've been using Multilink PPP to give my users a 3M pipe over 2 of the
T1s at office A. I had a 3rd T1 installed in order to bump it up to
4.5M. Office B is serviced by a the single (fourth) T1.
Before the new T1 was installed everything worked fine (2 T1s using
MLPPP to office A and 1 T1 to office B). Now, with all 4 lines running,
the 3rd MLPPP line won't work (see 'sho int' and 'sho service-module'
below) but the original 3 lines work fine.
Now here's where it gets strange. If I remove the card servicing the T1
to office B and boot up the router, all 3 interfaces come up and MLPPP
works great, providing a 4.5M pipe. Once I shut down the router and
reinsert the card for office B, the 3rd MLPPP lines goes down again. I
tried swapping the office B card/cable with the card(s)/cable(s) from
the 1st and 2nd MLPPP lines and get the exact same results. Same goes
for the card/cable servicing the 3rd MLPPP line.
Am I missing a configuration step? I'm at a loss.
Again, I've swapped WIC cards, NM cards, and cables between all
interfaces and they all work. I've also tried different slots for the
NMs. No difference.
Help! TIA
Rich
_____________________________
interface Multilink1
ip address A.B.C.D 255.255.255.252
ip route-cache flow
fair-queue 64 16 0
no cdp enable
ppp multilink
ppp multilink fragment delay 10
ppp multilink interleave
ppp multilink group 1
!
interface MFR1
no ip address
!
interface FastEthernet0/0
ip address E.F.G.H 255.255.255.240
ip route-cache flow
speed 100
full-duplex
!
interface Serial0/0
bandwidth 1536
no ip address
encapsulation ppp
fair-queue
ppp multilink
ppp multilink group 1
!
interface FastEthernet0/1
ip address I.J.K.L 255.255.255.224
speed 100
full-duplex
!
interface Serial0/1
bandwidth 1536
no ip address
encapsulation ppp
fair-queue
ppp multilink
ppp multilink group 1
!
interface FastEthernet1/0
no ip address
speed 100
full-duplex
!
interface Serial1/0
bandwidth 1536
no ip address
encapsulation ppp
fair-queue
ppp multilink
ppp multilink group 1
!
interface FastEthernet1/1
ip address M.N.O.P 255.255.255.252 secondary
ip address Q.R.S.T 255.255.255.128 secondary
ip address U.V.W.X 255.255.255.248
speed 100
full-duplex
!
interface Serial1/1
ip address Y.Z.A.B 255.255.255.252
no ip mroute-cache
autodetect encapsulation ppp
08-28-2006 07:45 PM
Really don't find any problem on the hardware or software issue. Did you try to insert NM2FE-2W at slot 0 & 2 or solt 1 & 3 ?
Moreover, did you confirm the linecode is correct that there are may line code volidations.
Hope this helps.
08-28-2006 08:48 PM
Thanks for the reply!
The framing is ESF on both ends and line code is B8ZS. Like I said above, it's weird because it works if I remove the 4th card.
I'll try the cards in different slots.
Rich
08-28-2006 09:47 PM
Thanks. I can find the linecode and framing from your capture too. Wait for your result.
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