System information

Troubleshooting DECnet
Book Title
11-264
Possible Problem Solution
More than 32 routers
on the network
DECnet limits the number of adjacencies that can be established by a router to 32.
Step 1 Enable the debug decnet events privileged exec command to determine whether
the adjacency is being rejected. Enable this command on one router at a time.
Caution: Because debugging output is assigned high priority in the CPU process,
it can render the system unusable. For this reason, use debug commands only to
troubleshoot specific problems or during troubleshooting sessions with Cisco
technical support staff. Moreover, it is best to use debug commands during periods
of lower network traffic and fewer users. Debugging during these periods decreases
the likelihood that increased debug command processing overhead will affect
system use.
Step 2 If the adjacency is being rejected, reduce the number of adjacent routers or increase
the priority of a router that you want to be adjacent so that it has a higher priority
than one of the other neighboring routers. An adjacency will be established with
the router you want instead of with a router assigned a lower priority.
Syntax:
The following is the syntax to adjust the priority of a router:
decnet router-priority value
To elect a designated router to which packets will be sent when no destination is
specified, use the decnet router-priority interface configuration command.
Syntax Description:
• value—Priority of the router. This can be a number in the range 0 through 127.
The larger the number, the higher the priority. The default priority is 64.
Node address out of
range
Step 1 Use the show running-config privileged exec command to view router
configurations. Check to see whether the decnet max-address global configuration
command has been configured. This command sets the highest DECnet node
number allowed in the area.
Note: The decnet max-address command specifies the highest node number
allowed in an area, not the maximum number of node addresses allowed in an area.
For example, if you configure the command decnet max-address 1000 on a router
and you configure a node with a node address of 1001, the address is out of range.
Step 2 The default maximum address is 1023. However, if another value is configured, the
node address might be more than the configured value. If this is the case, increase
the maximum address value using the decnet max-address command.
Router area number is
higher than configured
decnet max-area
If the area number of a DECnet node (such as a router) is higher than the configured decnet
max-area value, the adjacency will be reset.
Step 1 Use the show running-config privileged exec command to view the router
configuration. Look for decnet max-area global configuration command entries.
This command sets the DECnet maximum area number for the router.
Note: The decnet max-area command specifies the highest area value allowed in
the network, not the maximum number of areas configurable. For example, if you
configure the command decnet max-area 60 and you configure a node with area
number 61, the node’s area address is out of range.
Step 2 Use the show running-config privileged exec command to find the area number
configured on other DECnet routers. Compare the value configured by the decnet
max-area command to the area numbers of other routers.
Step 3 If a router’s area number is higher than the value configured by the decnet
max-area global configuration command, reconfigure the decnet max-area
command so that the DECnet maximum area is higher than the area number of all
routers.