frame relay sub-interface static mapping

[sivam siva]

Hello

I'm learning frame-relay, Inverse ARP is not working in p2p subinterface, then I tried to configure static mapping which also not able to do. I have attached output below can anyone explain me 

 

interface Serial6/7
no ip address
encapsulation frame-relay
serial restart-delay 0
!
interface Serial6/7.32 point-to-point
ip address 10.10.23.3 255.255.255.0
frame-relay interface-dlci 32
!
interface Serial6/7.36 point-to-point
ip address 192.168.36.3 255.255.255.0
frame-relay interface-dlci 36

Thanks

Siva 

[Georg Pauwen]

Hello,

what are you using, a simulator (e.g. GNS3) or live routers ?

[Martin L]

With FR it is important to check your FR switch (one that provides DLCIs). GNS3 has one build in that works great. if u do FR yourself on your own router at home, then make sure your FR switching settings are correct. Not sure how VIRL handles FR switching.

Static FR mappings are not accepted by router on p2p links (as pointed out by CLI above) because there can be only 1 neighbor on the other side. so, you only need frame-relay interface-dlci x command. that command just tells router which dlci belongs to which interface. I think p2p interfaces will automatically disable Inverse ARP.

Multi-point interfaces can use either command. The "frame-relay interface dlci x command is needed on multi-point links to tell router this dlci belongs to this interface. Multi-point interfaces do rely on Inverse ARP. If u want to disable Inverse Arp is using with "frame-relay map ip x.x.x.x dlci y , which also tells router use this dlci x on that interface.

what exams do u study for ? as far as I know, FR is gone on most exams; replaced by DMVPN.