Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Community Member

MFR link not coming up

Hi

I have two frame-relay link configured as MFR on cisco 2821 with IOS c2800nm-advipservicesk9-mz.124-19.bin.On CE end its showig UP/Down but at PE end its showing down/down, Searched cisco site but found only one document but even could help me out.

CE End Config :

Links  connected on WIC-2T

!

interface MFR1
no ip address
ip flow ingress
encapsulation frame-relay IETF
frame-relay lmi-type ansi
!
interface MFR1.101 point-to-point
ip address x.x.x.x 255.255.255.252
ip flow ingress
snmp trap link-status
frame-relay interface-dlci 101 IETF
!

interface Serial0/1/0
no ip address
ip flow ingress
encapsulation frame-relay MFR1
no arp frame-relay
!
interface Serial0/1/1
no ip address
ip flow ingress
encapsulation frame-relay MFR1
no arp frame-relay

============

AT CE END

sh frame-relay multilink detailed
Bundle: MFR1, State = down, class = A, fragmentation disabled
BID = MFR1
No. of bundle links = 2, Peer's bundle-id =
Rx buffer size = 12000, Lost frag timeout = 200
Bundle links:

  Serial0/1/1, HW state = up, link state = Add_sent, LID = Serial0/1/1
    Cause code = bundle link idle, Ack timer = 4, Hello timer = 10,
    Max retry count = 2, Current count = 0,
    Peer LID = , RTT = 0 ms
    Statistics:
    Add_link sent = 30346, Add_link rcv'd = 0,
    Add_link ack sent = 0, Add_link ack rcv'd = 0,
    Add_link rej sent = 0, Add_link rej rcv'd = 0,
    Remove_link sent = 4, Remove_link rcv'd = 0,
    Remove_link_ack sent = 0, Remove_link_ack rcv'd = 0,
    Hello sent = 0, Hello rcv'd = 0,
    Hello_ack sent = 0, Hello_ack rcv'd = 0,
    outgoing pak dropped = 0, incoming pak dropped = 0

  Serial0/1/0, HW state = up, link state = Add_sent, LID = Serial0/1/0
    Cause code = bundle link idle, Ack timer = 4, Hello timer = 10,
    Max retry count = 2, Current count = 0,
    Peer LID = , RTT = 0 ms
    Statistics:
    Add_link sent = 30359, Add_link rcv'd = 0,
    Add_link ack sent = 0, Add_link ack rcv'd = 0,
    Add_link rej sent = 0, Add_link rej rcv'd = 0,
    Remove_link sent = 6, Remove_link rcv'd = 0,
    Remove_link_ack sent = 0, Remove_link_ack rcv'd = 0,
    Hello sent = 0, Hello rcv'd = 0,
    Hello_ack sent = 0, Hello_ack rcv'd = 0,
    outgoing pak dropped = 0, incoming pak dropped = 0

====================================================================================================

PE Config

interface MFR996

no ip address

encapsulation frame-relay IETF

logging event subif-link-status

logging event dlci-status-change

frame-relay multilink bandwidth-class c 1

frame-relay lmi-type ansi

frame-relay intf-type dce

!

interface MFR996.101 point-to-point

ip vrf forwarding V224:xxx_A_1138xxx

ip address x.x.x.x 255.255.255.252

frame-relay interface-dlci 101 IETF  

!

interface Serial8/0/16:0

no ip address

encapsulation frame-relay MFR996

no arp frame-relay

!

interface Serial8/0/18:0

no ip address

encapsulation frame-relay MFR996

no arp frame-relay

============

AT PE END

show frame-relay multilink MFR996 detailed

Bundle: MFR996, State = down, class = C (threshold 1), fragmentation disabled

BID = MFR996

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

Rx buffer size = 24096, Lost frag timeout = 200

Bundle links:

  Serial8/0/18:0, HW state = down, link state = Down, LID = Serial8/0/18:0

    Cause code = bundle link idle, Ack timer = 4, Hello timer = 10,

    Max retry count = 2, Current count = 0,

    Peer LID = , RTT = 0 ms

    Statistics:

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

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

    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 = 0, Hello rcv'd = 0,

    Hello_ack sent = 0, Hello_ack rcv'd = 0,

    outgoing pak dropped = 0, incoming pak dropped = 0

  Serial8/0/16:0, HW state = down, link state = Down, LID = Serial8/0/16:0

    Cause code = bundle link idle, Ack timer = 4, Hello timer = 10,

    Max retry count = 2, Current count = 0,

    Peer LID = , RTT = 0 ms

    Statistics:

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

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

    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 = 0, Hello rcv'd = 0,

    Hello_ack sent = 0, Hello_ack rcv'd = 0,

    outgoing pak dropped = 0, incoming pak dropped = 0

hope to get some soution from cisco technocrats

Everyone's tags (2)
5 REPLIES
Cisco Employee

MFR link not coming up

Hello,

I am not very familiar with MFR but what I find odd is this output on your PE:

Serial8/0/18:0, HW state = down, link state = Down, LID = Serial8/0/18:0

Serial8/0/16:0, HW state = down, link state = Down, LID = Serial8/0/16:0

This looks as if the interfaces or the subinterfaces themselves were not operational, and hence the MFR bundle also cannot work. Are the corresponding physical interfaces activated and properly configured? Is this running some T or E line?

Best regards,

Peter

Community Member

MFR link not coming up

Thanks Peter for jumping in ,Even I have noticed the same thing and informed service provider and got follwoing reply from SP :

"The only way we can get the PE interfaces to come up, is when loops are applied. Once the circuit is patched through to the CE, both Serial interfaces stay down. I've no idea why the CE interfaces are up/down, and the PE interfaces are down/down. I've check the controllers for both interfaces, and they both are showing "Receiver has loss of frame". Any ideas what might be causing this? The controllers are configured with Internal clock source, and no-crc4. I've already changed these settings, but it doesn't make any difference"

Cisco Employee

MFR link not coming up

Hello,

The logical question is whether the CSU/DSU at the PE site is correctly connected and operating. At least the interface should be in up/down - a Serial interface in the down/down state means that there is most probably a physical layer fault.

Do you have an overview of how the physical interconnection between CE and PE exactly looks like? Would it be possible to post it here as a picture?

Thanks!

Best regards,

Peter

Community Member

MFR link not coming up

The link is come up and it was the problem with the service provider modem settings .

Cisco Employee

MFR link not coming up

Hello,

So you're saying it is working now? Great!

Best regards,

Peter

2258
Views
0
Helpful
5
Replies
CreatePlease to create content