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Configuring VWIC-MFT and MultiLink PPP for data

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Sep 28, 2009 7:33 AM
Sep 28th, 2009

In this example we just installed 2 2-port VWIC-MFT cards, one is slot and  one is slot 3. Once installed you'll notice no additional serial interfaces nor  controller cards. However a show inventory shows the cards are installed.

NAME: "VWIC2-2MFT-T1/E1 - 2-Port RJ-48 Multiflex Trunk -  T1/E1 on Slot 0 SubSlot 2", DESCR: "VWIC2-2MFT-T1/E1 - 2-Port RJ-48 Multiflex  Trunk - T1/E1"
PID: VWIC2-2MFT-T1/E1  , VID: V01 , SN: FOC1228####
NAME: "VWIC2-2MFT-T1/E1 - 2-Port RJ-48 Multiflex Trunk - T1/E1 on Slot 0 SubSlot  3", DESCR: "VWIC2-2MFT-T1/E1 - 2-Port RJ-48 Multiflex Trunk - T1/E1"
PID: VWIC2-2MFT-T1/E1  , VID: V01 , SN: FOC1228####

Our first task is to configure the card type. These are T1's so let's  configure that.

card type t1 0 2
card type t1 0 3

Note that the 0 is from the Slot number (see show inventory) and the 2 is the  SubSlot number.

You should now see 4 new controllers. Let's configure them next.

controller T1 0/2/0
framing esf
linecode b8zs

clock source line independent <--- in the case it is not internal
channel-group 0 timeslots 1-24
!
controller T1 0/2/1
framing esf
linecode b8zs

clock source line independent <--- in the case it is not internal

channel-group 0 timeslots 1-24
!
controller T1 0/3/0
framing esf

linecode b8zs

clock source line independent <--- in the case it is not internal
channel-group 0 timeslots 1-24
!
controller T1 0/3/1
framing esf
linecode b8zs

clock source line independent <--- in the case it is not internal
channel-group 0 timeslots 1-24

The reason for the "independent" keyword is to have the interfaces in the VWIC card to work with separate "clocking domain" one from the other.

Now that we have the controllers configured you should see 4 new serial  interfaces.

Serial0/2/0:0 unassigned YES manual down down
Serial0/2/1:0 unassigned YES manual down down
Serial0/3/0:0 unassigned YES manual down down
Serial0/3/1:0 unassigned YES manual down down

Now we can configure the serial interfaces.

interface Serial0/2/0:0
no ip address
encapsulation ppp
multilink
ppp multilink group 2

interface Serial0/2/1:0
no ip address
encapsulation ppp
ppp multilink
ppp multilink group 2

interface Serial0/3/0:0
no ip address
encapsulation ppp
ppp multilink
ppp multilink group 2

interface Serial0/3/1:0
no ip address
encapsulation ppp
ppp multilink
ppp multilink group 2

Finally let's configure the virtual MultiLink2 interface.

interface Multilink2
  description MLPPP Link for Point-To-Point
  ip unnumbered FastEthernet0/0
  ip route-cache flow
  no ip mroute-cache
  ppp multilink
  ppp multilink links maximum 4
  ppp multilink group 2
  ppp multilink fragment disable

Don't forget your routing (if needed)!

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