3com 3.01.01 Benutzerhandbuch

[Switch B-rip]network 110.11.2.0 

3 Configure RIP on Switch C:

[Switch C]rip

[Switch C-rip]network 117.102.0.0

[Switch C-rip]network 110.11.2.0

The Switch 8800 cannot receive update packets when the physical connection to 
the peer routing device is normal.

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RIP does not operate on the corresponding interface (for example, if the undo 
rip work command is executed) or this interface is not enabled through the 
network command. 

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The peer routing device is configured for multicast mode (for example, the rip 
version 2 multicast command is executed) but the multicast mode has not 
been configured on the corresponding interface of the local switch.

Open Shortest Path First (OSPF) is an Interior Gateway Protocol (IGP). At present, 
OSPF version 2 (RFC2328) is used, which has the following features:

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Scope — Supports networks of various sizes and can support several hundred 
routers

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Fast convergence — Transmits the update packets instantly after the network 
topology changes so the change is synchronized in the AS

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Loop-free — Calculates routes using the shortest path tree algorithm, 
according to the collected link states so that no loop routes are generated from 
the algorithm itself

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Area partition — Allows the network of AS to be divided into different areas 
for management convenience, so that the routing information that is 
transmitted between the areas is further abstracted to reduce network 
bandwidth consumption

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Equal-cost multi-route — Supports multiple equal-cost routes to a destination

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Routing hierarchy — Supports a four-level routing hierarchy that prioritizes 
routes into intra-area, inter-area, external type-1, and external type-2 routes.

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Authentication — Supports the interface-based packet authentication to 
guarantee the security of the route calculation

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Multicast transmission — Uses multicast addresses to send updates. 

Configuring OSPF is described in the following sections:

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The OSPF protocol calculates routes in the following way:

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Each OSPF-capable router maintains a Link State Database (LSD), which 
describes the topology of the entire AS. According to the network topology 
around itself, each router generates a Link State Advertisement (LSA). The 
routers on the network transmit the LSAs among themselves by transmitting