Frame Relay in direct link //INE vol1 question 2.10

Hello dears,

I'am very happing while i'm sending my first post here. [:P]

 

For this question, "back-to-back Frame Relay", I read in some WEB Links, and also in INE Solution Guide that  We must disable keepalive (LMI)

But  i noticed that, even i'm not  deactivating it the Lab is still working, and ip reachability working..

 

Can anyone clear this to me ?

Thanks in advance [:)] 

Comments

  • The reason that you need to disable keepalives is that without doing so it will tear the link down and its LMI status requests timeout.

    How did you have the 'back-to-back' serial connected, can you show the config from both sides?

    regards,

    David

    On Tuesday, 28 August 2012 at 16:29, abdou wrote:

    > Hello dears,
    > I'am very happing while i'm sending my first post here.
    >
    > For this question, "back-to-back Frame Relay", I read in some WEB Links, and also in INE Solution Guide that We must disable keepalive (LMI)
    > But i noticed that, even i'm not deactivating it the Lab is still working, and ip reachability working..
    >
    > Can anyone clear this to me ?
    > Thanks in advance
    >
    >
    >
    > INE - The Industry Leader in CCIE Preparation
    > http://www.INE.com
    >
    > Subscription information may be found at:
    > http://www.ieoc.com/forums/ForumSubscriptions.aspx
  • Hi David,  and thanks for your quick answer

    The 2 routers are connected directly:   R4------Serial-Link--------R5   (like the SG) ,

     

    for config  is :

     

    R4

    interface serial 0/1

      ip address 155.1.45.4 255.255.255.0

      encapsulation frame-relay

      frame-relay map ip 155.1.45.5 514 broadcast

     

    R5

    interface serial 0/1

     ip address 155.1.45.5 255.255.255.0

     encapsulation frame-relay

     frame-relay map ip 155.1.45.4 514 broadcast

     

    so as you see, the ping is working and all normal, even i didn't de-active explicitly the keepalive.

     

     

  • Those interfaces don't look to be L1 adjacent, are those the complete configs?

    Do you see each other via CDP as adjacent? What is the output of 'show frame-relay lmi'


    On Tuesday, 28 August 2012 at 16:52, abdou wrote:

    > Hi David, and thanks for your quick answer
    > The 2 routers are connected directly: R4------Serial-Link--------R5 (like the SG) ,
    >
    > for config is :
    >
    > R4
    > interface serial 0/1
    > ip address 155.1.45.4 255.255.255.0
    > encapsulation frame-relay
    > frame-relay map ip 155.1.45.5 514 broadcast
    >
    > R5
    > interface serial 0/1
    > ip address 155.1.45.5 255.255.255.0
    > encapsulation frame-relay
    > frame-relay map ip 155.1.45.4 514 broadcast
    >
    > so as you see, the ping is working and all normal, even i didn't de-active explicitly the keepalive.
    >
    >
    >
    >
    >
    > INE - The Industry Leader in CCIE Preparation
    > http://www.INE.com
    >
    > Subscription information may be found at:
    > http://www.ieoc.com/forums/ForumSubscriptions.aspx
  • Hi David, you are right,  i reloaded the Router then it works properly (ping don't work until i use "no keepalive" just like expected)

    I think this phenomenon was due to some wrong cache or maybe the Router has headache [:)]

    Anyway, even i don't know what the main reason for that phenomenon, at least now i see  some normal things !

    Thanks a lot !

  • Yes - no keepalive is a requirement. Is this real gear or dynamips? It should NOT work with LMIs, as on a B2B Frame-Relay you don't have a FRSW.

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