User manual

8 Frame relay configuration
Nortel Secure Router 8000 Series
Configuration -WAN Access
8-30 Nortel Networks Inc. Issue 5.3 (
30 March 2009)
Bad PVCs list:
Good PVCs list:
OUT Serial5/0/0:0 VC:200 STATUS:GOOD; IN Serial5/0/2:0 VC:100 STATUS:GOOD
SLAVE,Total 1 PVCs, 0 PVCs is ok; UP PVCs critical value:100%
Bad PVCs list:
OUT Serial5/0/0:1 VC:300 STATUS:BAD; IN Serial5/0/2:0 VC:100 STATUS:GOOD
Good PVCs list:
8.8 Configuring frame relay over an IP network
8.8.1 Establishing the configuration task
Applicable environment
With the increasing wide application of IP networks, you need to implement the FR network
based on FR over IP (FRoIP). FRoIP creates GRE tunnel between FR networks at two ends
and transmits FR packets through the GRE tunnel. After setting the GRE tunnel interface, the
FR switching can use it to complete FRoIP. For detailed information, see
Figure 8-4.
Figure 8-4 Typical application diagram of FR over IP
IP network
Frame relay
network
Frame relay
network
Tunnel
You can divide FR packets transmitted on the GRE tunnel into three groups:
z
FR datagram that has encapsulated with IP header
z
Inverse ARP packet
z
LMI packet used to negotiate PVC status on GRE tunnel
You can implement this function using FR switching route and FR switching PVC.
Preconfiguration tasks
Before configuring FR over an IP network and IP header compression, you need to complete
the following tasks:
z
Configuring physical parameters for FR interfaces
z
Configuring basic frame relay DTE capability or Configuring basic frame relay DCE
capability
z
Creating and configuring the source address and destination address of the tunnel
interface