Information Technology Reference
In-Depth Information
Table10-1
Local SRB: Host Cannot Connect to Server (continued)
Possible Problem
Solution
Router that is not
configured to
forward spanning
explorers
Spanning explorer packets are equivalent to a single-route
broadcast. Routers must therefore be configured to route them.
1.
Use the
show source-bridge
exec command to determine
whether the spanning explorer count is incrementing.
2.
If the spanning explorer count is not incrementing, use the
show running-config
privileged exec command on routers
to see whether the
source-bridge spanning
interface
configuration command is configured. This command
configures the router to forward spanning explorers.
3.
If the command entry is not present in the configuration, add
it to any router that is required to pass spanning explorers.
The command syntax is as follows:
source-bridge spanning
bridge-group
[
path-cost
path-cost
]
Syntax description:
•
bridge-group
—Number in the range 1 to 9 that you choose
to refer to a particular group of bridged interfaces.
•
path-cost
—(Optional) Path cost for a specified interface.
•
path-cost
—(Optional) Path cost for the interface. The valid
range is 0 to 65535.
Example:
The following example adds Token Ring 0 to bridge group 1 and
assigns a path cost of 12 to Token Ring 0:
interface tokenring 0
source-bridge spanning 1 path-cost 12
Use the
show source-bridge
exec command to determine
whether explorers are being sent.
4.
Router that is not
configured to
forward spanning
explorers
(continued)
5.
If explorers are not being sent, place a network analyzer on
the same ring to which the end system is connected.
6.
If you find spanning all-ring frames, use the
show
running-config
privileged exec command to make sure that
the router is properly configured. If sessions still cannot be
established over the SRB, contact your technical support
representative for more assistance.
1.
Although you can enter the ring number in hexadecimal or decimal, it always appears in the
configuration as a decimal number.
2.
FDDI = Fiber Distributed Data Interface
3.
PVC= permanent virtual circuit
4.
RIF = routing information field
5.
MAC = Media Access Control
