
Configuring Bridging Services
4-8 117351-A Rev. A
• FDDI encapsulation
• Native SRB on FDDI
Loop-Free Operation
Loops occur in the network when there are several different routes between hosts.
Bridges may forward traffic indefinitely around the loops, which results in
degraded network performance. To eliminate loops, you can use one of the
methods described in the following sections.
Physically Disabling Loops
You can discover loops in your network using a configuration diagram. Then you
can physically adjust the network configuration to eliminate the loops. For
example, assume that F
igure 4-1 is a diagram of a portion of your network.
Figure 4-1. Network Configuration with Potential Loop
You want to send a packet from TB network 1 to TB network 2. As shown in the
figure, there are two possible routes between these two networks:
• Through bridge B, across the SR network, through bridge C, to the destination
on TB network 2.
XB XB
TB network 1
TB network 2
Bridge A
Bridge B
Bridge C
Bridge D
TB network 3
loop
Key
TB = transparent bridge
XB = translation bridge
TB TB
SR network
BRG0024A
Comentarios a estos manuales