vlans with 2mft-t1 card and frame relay

Answered Question
Jul 4th, 2007
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Hello,

I am currently trying to extend our metro Ethernet with 1841 routers equipped with a 2mft-t1 card 4esw switch card.

I am trying this using point to point frame relay with separate bridge groups for each Vlan.

Currently the config is working but spanning tree is blocking one of my t1 connections.

Please Help!





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alandversitch Wed, 07/04/2007 - 07:00
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Hello,

I believe you are correct I was wondering if any one knew of a workaround. If this was a standard bridge group I believe that I could use circuit groups.

Frame relay does not allow me to apply circuit groups.


Thanks

alandversitch Wed, 07/04/2007 - 07:30
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Hello,

Thanks for the suggestion.

I have already tried this.

I did manage to get it working.

The speed was very slow. I think it would be better if i had tweaked it.

Spanning tree was still blocking the one link. This seemed very strange to me because ppp multilink works fine when configured with bridge groups.



interface MFR1

no ip address

!

interface MFR1.1 point-to-point

ip address 10.102.102.2 255.255.255.0

frame-relay interface-dlci 1000

bridge-group 1

!

interface MFR1.2 point-to-point

ip address 10.103.103.2 255.255.255.0

frame-relay interface-dlci 300

bridge-group 2


interface Serial0/1/0:0

no ip address

ip load-sharing per-packet

encapsulation frame-relay MFR1

no arp frame-relay

!

interface Serial0/1/1:1

no ip address

ip load-sharing per-packet

encapsulation frame-relay MFR1

no arp frame-relay


router2#show spanning-tree summary

Root bridge for: Bridge group 1, Bridge group 2, VLAN300.

PortFast BPDU Guard is disabled

UplinkFast is disabled

BackboneFast is disabled


Name Blocking Listening Learning Forwarding STP Active

-------------------- -------- --------- -------- ---------- ----------

Bridge group 1 2 0 0 1 3

Bridge group 2 0 0 0 2 2

-------------------- -------- --------- -------- ---------- ----------

2 Bridge Groups 2 0 0 3 5

Name Blocking Listening Learning Forwarding STP Active

-------------------- -------- --------- -------- ---------- ----------

VLAN300 0 0 0 1 1

-------------------- -------- --------- -------- ---------- ----------

1 VLAN 0 0 0 1 1


Blocking Listening Learning Forwarding STP Active

-------------------- -------- --------- -------- ---------- ----------

Total 2 0 0 4 6



alandversitch Wed, 07/04/2007 - 10:26
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Hello,

I have gone back and retried the mpp frame relay configuration without the ip addresses.

I also made some other changes.

It seems like my spanning tree issue may be ok now but my speed is very slow for the most part but does occasionally burst above 2Mbps.

alandversitch Wed, 07/04/2007 - 11:14
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Hello,

I have turned off the per packet load balancing. This did not seem to make a difference.

I cannot find how to change the fragmentation setting.



Hi,


Try something like this:


interface MFR1.1 point-to-point

frame-relay interface-dlci 1000

class frag

bridge-group 1

!

interface MFR1.2 point-to-point

frame-relay interface-dlci 300

class frag

bridge-group 2


map-class frame-relay frag

frame-relay cir 1536

frame-relay bc 12500

frame-relay be 0

frame-relay mincir 1536

frame-relay fragment 1600


Please note that with these settings both PVCs will get 1536k equally and will be fragmented to 1600 bytes/frame. It will lower serialization delay but obviously you won't have more bandwidth :)


Hope if helps

Krisztian

alandversitch Thu, 07/05/2007 - 05:20
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Hello,


Thanks for your response.

I tried your suggestion but still have very slow speeds.

If I disconnect one of the t1's I get a consistant ~1.4Mbs.

alandversitch Thu, 07/05/2007 - 07:46
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Hello

This is the show frame-relay multilink mFR 1 command on both routers. I have tried few versions of ios now. Currnetly I am running 12.4(16)advanced ip the newest one.


I have run a debug and I am getting some errors.


*Jul 5 15:03:12.011: frame_relay_input: F8812000 2B4C5B7, size= 330

*Jul 5 15:03:12.019: frame_relay_input: 48C12000 2B4C4B7, size= 330

*Jul 5 15:03:12.091: MFR1/300: Lost fragment 546 (all links out of sequence)

*Jul 5 15:03:12.491: MFR1/300: Lost fragment 57A (all links out of sequence)

*Jul 5 15:03:12.695: MFR1/300: Lost fragment 594 (all links out of sequence)


The other versions I have tried are

124-6.T7

124-13c

124-11.T2




router1# show frame-relay multilink mfR 1 detailed

Bundle: MFR1, State = up, class = A, fragmentation disabled

BID = first-bundle

No. of bundle links = 2, Peer's bundle-id = first-bundle

Rx buffer size = 24096, Lost frag timeout = 200

Bundle links:


Serial0/1/1:1, HW state = up, link state = Up, LID = Serial0/1/1:1

Cause code = none, Ack timer = 4, Hello timer = 10,

Max retry count = 2, Current count = 0,

Peer LID = Serial0/1/1:1, RTT = 0 ms

Statistics:

Add_link sent = 2, Add_link rcv'd = 1,

Add_link ack sent = 1, Add_link ack rcv'd = 2,

Add_link rej sent = 0, Add_link rej rcv'd = 0,

Remove_link sent = 0, Remove_link rcv'd = 0,

Remove_link_ack sent = 0, Remove_link_ack rcv'd = 0,

Hello sent = 951, Hello rcv'd = 949,

Hello_ack sent = 949, Hello_ack rcv'd = 942,

outgoing pak dropped = 0, incoming pak dropped = 0


Serial0/1/0:0, HW state = up, link state = Up, LID = Serial0/1/0:0

Cause code = none, Ack timer = 4, Hello timer = 10,

Max retry count = 2, Current count = 0,

Peer LID = Serial0/1/0:0, RTT = 0 ms

Statistics:

Add_link sent = 2, Add_link rcv'd = 1,

Add_link ack sent = 1, Add_link ack rcv'd = 2,

Add_link rej sent = 0, Add_link rej rcv'd = 0,

Remove_link sent = 0, Remove_link rcv'd = 0,

Remove_link_ack sent = 0, Remove_link_ack rcv'd = 0,

Hello sent = 946, Hello rcv'd = 1052,

Hello_ack sent = 1052, Hello_ack rcv'd = 946,

outgoing pak dropped = 0, incoming pak dropped = 0





router2#show frame-relay multilink mFR 1 detailed

Bundle: MFR1, State = up, class = A, fragmentation disabled

BID = first-bundle

No. of bundle links = 2, Peer's bundle-id = first-bundle

Rx buffer size = 24096, Lost frag timeout = 200

Bundle links:


Serial0/1/1:1, HW state = up, link state = Up, LID = Serial0/1/1:1

Cause code = none, Ack timer = 4, Hello timer = 10,

Max retry count = 2, Current count = 0,

Peer LID = Serial0/1/1:1, RTT = 0 ms

Statistics:

Add_link sent = 2, Add_link rcv'd = 2,

Add_link ack sent = 2, Add_link ack rcv'd = 1,

Add_link rej sent = 0, Add_link rej rcv'd = 0,

Remove_link sent = 0, Remove_link rcv'd = 0,

Remove_link_ack sent = 0, Remove_link_ack rcv'd = 0,

Hello sent = 892, Hello rcv'd = 893,

Hello_ack sent = 893, Hello_ack rcv'd = 894,

outgoing pak dropped = 0, incoming pak dropped = 0


Serial0/1/0:0, HW state = up, link state = Up, LID = Serial0/1/0:0

Cause code = none, Ack timer = 4, Hello timer = 9,

Max retry count = 3, Current count = 0,

Peer LID = Serial0/1/0:0, RTT = 0 ms

Statistics:

Add_link sent = 2, Add_link rcv'd = 2,

Add_link ack sent = 2, Add_link ack rcv'd = 1,

Add_link rej sent = 0, Add_link rej rcv'd = 0,

Remove_link sent = 0, Remove_link rcv'd = 0,

Remove_link_ack sent = 0, Remove_link_ack rcv'd = 0,

Hello sent = 991, Hello rcv'd = 891,

Hello_ack sent = 891, Hello_ack rcv'd = 991,

outgoing pak dropped = 0, incoming pak dropped = 0



alandversitch Thu, 07/05/2007 - 08:57
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Hello,

This is actually a back to back link to extend our metro ethernet service.

Currently the 2 routers are on my desk and have 2 t1 crossovers connected between them.

There should be no difference in delay.

alandversitch Thu, 07/05/2007 - 10:30
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Thanks


Turns out I didn't have the controller clock set properly. The speed is now fine.

I can now go on with my testing.


Thanks for all of your help it was great.

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