Avaya Configuring VINES Services Manual de usuario descargar pdf (Pagina 30)

Configuring VINES Services

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303544-A Rev 00

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 Table 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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Avaya Configuring VINES Services Manual de usuario Pagina 30