ES4710BD 10 Slots L2/L3/L4 Chassis Switch
Parameters: <network> and <mask> are the network IP address and mask in decimal format; <area_id> is the area number from 0 to 4294967295; advertise notadvertise specifies whether or not broadcast the summary route information within the network.
Default: The system has no default area configured; if configured, it assumes to broadcast summary information by default.
Command Mode: OSPF protocol configuration mode
Usage Guide: Once a part of a network joins an area, all interior routes of that network will no longer be broadcasted to the other areas independently, but the summary information for that whole network.. The introduction of network scope and scope limit can reduce routing information traffic between areas.
Example: Specifying network scope 10.1.1.0, 255.255.255.0 to join area 1.
18.4.2.2.16 preference
Command: preference [ase] <preference > no preference [ase]
Function: Configures the priority of OSPF among all the routing protocols, and the priority for AS exterior routes introduced; the “no preference [ ase ]” command restores the default setting. Parameters: ase means the priority is used when introducing exterior routes outside the AS; <preference > is the priority value ranging from 1 to 255.
Default: The default priority of OSPF protocol is 110; the default priority to introduce exterior route is 150.
Command Mode: OSPF protocol configuration mode
Usage Guide: As a layer 3 switch may have several dynamic routing protocol running, there arises the issue of information sharing and selection among routing protocols. For this reason, each routing protocol has a default priority,. When the same route is discovered by different protocols, the one with the higher priority overrules. Priority changes will be applied on newly constructed routes. Due to the nature of OSPF, the OSPF priority should not be set too low.
Example: Setting in OSPF the default priority to introduce ASE route to 20. Switch(Config-
18.4.2.2.17 redistribute ospfase
Command: redistribute ospfase { bgp connected static rip} [type { 1 2 }] [tag <tag>]
[metric <cost_value>]
no redistribute ospfase { bgp connected static rip}
Function: Introduces BGP routes, direct routes, static routes and RIP routes as external routing information; the “no redistribute ospfase { bgp connected static rip }” command cancels the introduction of external routing information.
Parameters: bgp stands for introduce BGP routes as the exterior route information source; connected for direct routes; static for static routes; rip for routes discovered by RIP; type specifies the type of exterior routes, 1 and 2 represent type1 exterior routes and type2 exterior routes,
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