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There is still no way that a node in domain A area 5 can communicate directly to a
node in domain B area 5. For nodes in these two areas to communicate, you must
do a series of application-level relays using the set host command. For example:
v Run the set host command to remotely login from a node in the domain A area 5
to a node in domain A area 8.
v Run the set host command to remotely login from a node in domain A area 8 to a
node in area 1 or 2.
v Run the set host command to remotely login from a node in area 1 or 2 to a
node in domain B area 5.
Configuring DNA IV
The DNA IV protocol runs over Token-Ring, Frame Relay, Ethernet, PPP,
Token-Ring ATM LAN Emulation clients, Ethernet LAN Emulation clients,and X.25
interfaces. The following sections describe the procedures for configuring the DNA
IV protocol to work over Token-Ring and X.25 interfaces.
Note: When operating in mixed DNA IV and DNA V networks, all DNA IV
configuring and monitoring must be done from the process described in this
chapter.
DNA IV and DNA V Algorithm Considerations
DNA IV uses a distance-vector routing algorithm. DNA V can use either a
distance-vector or a link-state routing algorithm. The algorithm that the bridging
router selects is according to what protocol is enabled and disabled, and any
combinations that can result from these two protocols. (See Table 57.)
Table 57. DNA IV and DNA V Algorithm Considerations
DECnet IV Status OSI/DNA V Status Algorithm Selected
Enabled Disabled Distance-vector (automatically)
Disabled Enabled Link-state (automatically)
Enabled Enabled Use the set algorithm
command to configure this
information into SRAM.
Configuring DNA IV For Token Ring
The procedure to run the DNA IV protocol over 802.5 Token Ring (TR) involves
commands from the DNA IV and Token-Ring configuration processes.
1. From the OPCON prompt (*) enter the configuration process.
* talk 6
Config>
2. Enter list device to see the interface numbers for the Token-Ring interfaces.
Note the interface number of each Token-Ring interface.
Config> list device
3. Use the network command with the interface number of the Token-Ring
interface you want to configure. This places you in the Token-Ring configuration
process.
Config> network 0
TKR config>
4. Use the list command to verify the Token Ring configuration information.
TKR config> list
Token-Ring configuration:
Using DNA IV
Chapter 7. Using DNA IV 261