Configure VWIC-MFT and MultiLink PPP

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
channel-group 0 timeslots 1-24

controller T1 0/2/1
framing esf
linecode b8zs
channel-group 0 timeslots 1-24

controller T1 0/3/0
framing esf
linecode b8zs
channel-group 0 timeslots 1-24

controller T1 0/3/1
framing esf
linecode b8zs
channel-group 0 timeslots 1-24

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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