How would you backup your Frame-relay links betweeen sites?

[rszumloz]

We have a need to backup or do overflow type routing between sites in the event our frame-relay line goes down or service is degraded. We are exploring several options such a VPN using a access circuit or ISDN. What stategy are you currently and are you happy with thte performance?

[rsissons]

In my experience, most sites just use ISDN using the backup interface command.

[ricky.morgan]

Other than an ISDN as backup you could get a lower CIR frame circuit from another vendor and load balence weighing the load to your primary circuit