FR SVC for 7200-serial-7200

k.korlyakov · ‎01-16-2008

Hello,

is it possible to configure 2 7200 (7200-Serial-7200) for FR SVC ?

Whether a real FR Switch is mandatory between 7200s ?

Thanks in advance,

Kirill

ankbhasi · ‎01-16-2008

Hi Kirill,

AFAIK you need to have a frame relay switch in the middle. If you do not have a real fream relay switch you can simulate one using cisco router.

http://www.ciscopress.com/articles/article.asp?p=170741&seqNum=7&rl=1

HTH

Ankur

k.korlyakov · ‎01-16-2008

"The Frame Relay switching enhancement feature currently does not support SVC switching functionalities. Presently, only PVC switching is supported."

Feature Navigator says the same - FR SVC Switching not yet supported :(

Thanks for help,

Kirill

pcameron · ‎01-18-2008

if you just want to connect two routers back to back without a frame relay network in the between (for example another IOS router configured as a FR switch) there are two ways -

1) disable LMI keepalive on the interface. This stops router from sending or expecting LMI traffic so the interface will stay up permanently.

router 1

interface serial X/Y

encapsulation frame-relay

no keepalive

...

router 2

interface serial X/Y

encapsulation frame-relay

no keepalive

...

2) use the following configuration on one router to configure it as a frame relay DCE so it interfaces directly to the other frame relay DTE device -

frame-relay switching

interface serial X/Y

encapsulation frame-relay

frame-relay intf-type dce

you would still use PVC's via the same DLCI to pass traffic between each router.

Refer here for full details on frame relay config commands -

http://www.cisco.com/en/US/docs/ios/12_1/wan/command/reference/wrdfrely.html#wp1021315