Frame-relay back-to-back configuration...

r_durantr_durant Posts: 486Member
Sybex 5th Ed (pg 547) indicates that you can run frame-relay back-to-back using the following example...
RouterA

interface Serial0/0
 ip address 192.168.99.1 255.255.255.252
 no ip directed-broadcast
 encapsulation frame-relay
 clockrate 64000
 frame-relay interface-dlci 100
 frame-relay lmi-type ansi

RouterB

interface Serial0/0
 ip address 192.168.99.2 255.255.255.252
 no ip directed-broadcast
 encapsulation frame-relay
 frame-relay interface-dlci 100
 frame-relay lmi-type ansi


However, the connection doesn't come up using this setup (line up, protocol down)...should this config have actually worked?

I did some research and found the below config which worked...apparently you have to disable LMI's on the serial interface with the 'no keepalive' command...
Router A

interface Serial0/0
 no ip address
 no ip directed-broadcast
 encapsulation frame-relay
 no keepalive
 clockrate 64000
!
interface Serial0/0.1 point-to-point
 ip address 192.168.99.1 255.255.255.252
 no ip directed-broadcast
 frame-relay interface-dlci 100   

Router B

interface Serial0/0
 no ip address
 no ip directed-broadcast
 encapsulation frame-relay
 no keepalive
!
interface Serial0/0.1 point-to-point
 ip address 192.168.99.2 255.255.255.252
 no ip directed-broadcast
 frame-relay interface-dlci 100   
CCNA (Expired...), MCSE, CWNA, BSc Computer Science
Working on renewing CCNA!

Comments

  • tech-airmantech-airman Posts: 953Member
    r_durant wrote:
    Sybex 5th Ed (pg 547) indicates that you can run frame-relay back-to-back using the following example...
    RouterA
    
    interface Serial0/0
     ip address 192.168.99.1 255.255.255.252
     no ip directed-broadcast
     encapsulation frame-relay
     clockrate 64000
     frame-relay interface-dlci 100
     frame-relay lmi-type ansi
    
    RouterB
    
    interface Serial0/0
     ip address 192.168.99.2 255.255.255.252
     no ip directed-broadcast
     encapsulation frame-relay
     frame-relay interface-dlci 100
     frame-relay lmi-type ansi
    


    However, the connection doesn't come up using this setup (line up, protocol down)...should this config have actually worked?

    I did some research and found the below config which worked...apparently you have to disable LMI's on the serial interface with the 'no keepalive' command...
    Router A
    
    interface Serial0/0
     no ip address
     no ip directed-broadcast
     encapsulation frame-relay
     no keepalive
     clockrate 64000
    !
    interface Serial0/0.1 point-to-point
     ip address 192.168.99.1 255.255.255.252
     no ip directed-broadcast
     frame-relay interface-dlci 100   
    
    Router B
    
    interface Serial0/0
     no ip address
     no ip directed-broadcast
     encapsulation frame-relay
     no keepalive
    !
    interface Serial0/0.1 point-to-point
     ip address 192.168.99.2 255.255.255.252
     no ip directed-broadcast
     frame-relay interface-dlci 100   
    

    r_durant,

    Do you have a frame relay switch?
  • r_durantr_durant Posts: 486Member
    r_durant,

    Do you have a frame relay switch?

    No, not where I am right now...I have one at home, but not here at work
    CCNA (Expired...), MCSE, CWNA, BSc Computer Science
    Working on renewing CCNA!
  • NetstudentNetstudent Posts: 1,694Member
    Ya the no keepalive is the workaround for not having a frame-relay switch.
    There is no place like 127.0.0.1 BUT 209.62.5.3 is my 127.0.0.1 away from 127.0.0.1!
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