Enterasys Networks X-PeditionTM manual Interconnecting via Frame Relay Network

Interconnecting via Frame Relay Network

Interconnecting via Frame Relay Network

The following typical application uses FR to link remote branches to the corporate network at the central sites via a FR network, as shown in Figure 9-3.

Figure 9-3 Branch/Central Frame Relay Topology

Minneapolis

Houston

Memphis

Frame Relay switch combines DLCIs from various remote branch sites at 56 kbps into a single high speed Frame Relay T1 interface with a large number of DLCIs at the central sites.

	New York
Frame Relay	Chicago
Network

Central Sites

Toronto

Boston

Branch Sites

•Medium speed FR links (32 - 128 kbps)

•1-4 DLCIs linking one or more central sites on different subnets

•All DLCIs share characteristics (CIR, Bc, Be)

•IP traffic requires traffic prioritization, bandwidth allocation

•High speed FR link (clear channel T1/ E1 links, may be channelized or fractional T3)

•Many DLCIs per link

•May use sub-interfaces to connect to multiple subnets, each spanning multiple remote sites

•Link to many remote sites, may use FR QoS templates to address different remote sites

9-10 Configuring Frame Relay