Cabletron Systems SSIM-R8-02 Spécifications télécharger pdf (Page 157)

Enterasys Xpedition User Reference Manual 137

Configuring OSPF

Configuring Autonomous System External (ASE) Link Advertisements

Because of the nature of OSPF, the rate at which ASEs are flooded may need to be limited.

The following parameters can be used to adjust those rate limits. These parameters specify

the defaults used when importing OSPF ASE routes into the routing table and exporting

routes from the routing table into OSPF ASEs.

To specify AS external link advertisements parameters, enter the following commands in

the Configure mode:

Configuring OSPF for Different Types of Interfaces

The Enterasys Xpedition can run OSPF over a variety of physical connections: Serial

connections, LAN interfaces, ATM, or Frame Relay. The OSPF configuration supports four

different types of interfaces.

• LAN. An example of a LAN interface is an Ethernet. The XP will use multicast packets

on LAN interfaces to reach other OSPF routers. By default, an IP interface attached to

a VLAN that contains LAN ports is treated as an OSPF broadcast network.

• Point-to-Point. A point-to-point interface can be a serial line using PPP. By default, an

IP interface associated with a serial line that is using PPP is treated as an OSPF point-

to-point network. If an IP interface that is using PPP is to be treated as an OSPF

broadcast network, then use the type broadcast option of the interface create

command.

• Non-Broadcast Multiple Access (NBMA). An example of a NBMA network is a fully-

meshed Frame Relay or ATM network with virtual circuits. Because there is no general

multicast for these networks, each neighboring router that is reachable over the NBMA

network must be specified, so that routers can poll each other. The XP will unicast

packets to the routers in the NBMA network.

• Point-to-Multipoint (PMP). Point-to-multipoint connectivity is used when the network

does not provide full connectivity to all routers in the network. As in the case of NBMA

Specifies how often a batch of

ASE link state advertisements

will be generated and flooded

into OSPF. The default is 1 time

per second.

ospf set export-interval <num>

Specifies how many ASEs will

be generated and flooded in

each batch. The default is 250.

ospf set export-limit <num>

Specifies AS external link

advertisement default

parameters.

ospf set ase-defaults {[preference <num>]| [cost

<num>]|[type <num>] |

[inherit-metric]}

1 2 ... 152 153 154 155 156 157 158 159 160 161 162 ... 393 394

Commentaires sur ces manuels

Pas de commentaire

Cabletron Systems SSIM-R8-02 Spécifications Page 157

Commentaires sur ces manuels

Produits connexes et manuels pour Mise en réseau Cabletron Systems SSIM-R8-02