TCP IP Illustrated

4653 chapter 10 dynamic routing protocols rip rip rip

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Unformatted text preview: ts%20and%20Settings/bigini/Docu.../homenet2run/tcpip/tcp-ip-illustrated/dynamic.htm (10 of 17) [12/09/2001 14.46.53] Chapter 10. Dynamic Routing Protocols RIP: RIP: RIP: RIP: RIP: Address 140.251.0.0 140.252.9.0 140.252.10.0 140.252.11.0 Metric 16 (not reachable) 1 1 1 The route to the class B network 140.251 is bogus and should not be advertised. (It belongs to another institution, not noao.edu.) solaris % snoop -P -v -tr udp port 520 host gateway many lines deleted 0pcode = 2 (route RIP: response) RIP: Version = 1 Address RIP: Metric RIP: 140.252.101.0 1 RIP: 140.252.104.0 1 140.252.51.0 2 RIP: 2 140.252.81.0 RIP: 2 140.252.105.0 RIP: 2 140.252.106.0 RIP: RIP: 140.252.52.0 3 RIP: 140.252.53.0 3 RIP: 140.252.54.0 3 RIP: 140.252.55.0 3 RIP: 140.252.58.0 3 3 RIP: 140.252.60.0 3 3 RIP: 140.252.82.0 3 3 RIP: 192.68.189.0 3 140.252.57.0 RIP: 4 Figure 10.9 RIP response from gateway. The notation "BROADCAST" output by snoop in Figure 10.8 for the RIP packet sent by R10 means the destination IP address is the limited broadcast address 255.255.255.255 (Section 12.2), instead of the subnet-directed broadcast address (140.252.1.255) that the other routers use. 10.5 RIP Version 2 RFC 1388 [Malkin 1993a] defines newer extensions to RIP, and the result is normally called RIP-2. These extensions don't change the protocol, but pass additional information in the file:///D|/Documents%20and%20Settings/bigini/Docu.../homenet2run/tcpip/tcp-ip-illustrated/dynamic.htm (11 of 17) [12/09/2001 14.46.53] Chapter 10. Dynamic Routing Protocols fields labeled "must be zero" in Figure 10.3. RIP and RIP-2 can interoperate if RIP ignores the fields that must be zero. Figure 10.10 is a redo of that figure, as defined by RIP-2. The version is 2 for RIP-2. The routing domain is an identifier of the routing daemon to which this packet belongs. In a Unix implementation this could be the daemon's process ID. This field allows an administrator to run multiple instances of RIP on a single router, each operating within one routing do...
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This test prep was uploaded on 04/04/2014 for the course ECE EL5373 taught by Professor Guoyang during the Spring '12 term at NYU Poly.

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