Telematics Chapter 6: Network Layer - Freie Universität Berlin

Distance Vector Routing: The Bouncing Effect
● Routing tables contain a loop!
● Packets from C are bouncing
between A and B
● C sends its vector over link L5
● E adds costs of 10 to its own costs
of 0
● E ignores the message, because the
costs are higher as before
● A and E send vectors
● Update of B and D
Univ.-Prof. Dr.-Ing. Jochen H. Schiller ▪ cst.mi.fu-berlin.de ▪ Telematics ▪ Chapter 6: Network Layer
A
L 3
1
L 1
L 4
D E
1
L 6
B C
1 1
L 2
From Link Costs
1
10
A to C L1 4
B to C L1 5
C to C Locally 0
D to C L3 5
E to C L4 4
L 5
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