
Configuring VINES Services
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VINES Sequenced Routing Update Protocol
VINES Sequenced Routing Update Protocol (Sequenced RTP) differs from
Nonsequenced RTP in that routers identify routing information packets with
sequence numbers. Each router on the network has a sequence number that it
advertises to neighboring routers. The neighboring router uses the sequence
numbers to determine if its routing table contains the most current and accurate
routing information. Routers also use sequence numbers to time stamp changes in
the network topology.
With Sequenced RTP, routers and servers in a network consisting of only VINES
Version 5.50 devices do not perform periodic broadcasts of full routing tables; this
reduces the network bandwidth usage. A router sends out routing table
information only when
• A network topology change occurs
• Another router or client requests the information
• The network contains routers or servers configured for both Sequenced and
Nonsequenced RTP
The router sends out the routing table information as sequenced routing update
and sequenced routing response packets. (Refer to T
able 1-3 for details about the
routing tables and their contents.) Depending on the amount of information and
the type of physical media, a single update or response can consist of one or more
sequenced packets. Sequenced routing update and response packets have a 32-bit
sequence number ranging from 0x0 to 0xffffffff.
Each time a change occurs to a router’s local network topology, the router verifies
the sequence number, records the information in its routing table, and broadcasts a
sequenced routing update packet to its immediate neighbors. The packet contains
the router’s own sequence number incremented by one. This new sequence
number indicates that the router is transmitting new routing table information.
VINES Sequenced RTP has the following advantages:
• Reduces network bandwidth usage (when you set the RTP Mode parameter to
Sequenced RTP or Automode)
• Allows the router to interoperate with Banyan servers or clients running
VINES Version 4.11 or Version 5.50 software
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