Foundry Configuration Guide for the FESX, FSX, and FWSX
20 - 8
© Foundry Networks, Inc.
December 2005
If this comparison results in a change to the ID of an LSA that has already been generated, the router
generates a new LSA to replace the previous one. For example, if the router has already generated an LSA
for network with ID 10.0.0.0 for network 10.0.0.0 255.255.255.0, the router must generate a new LSA for the
network, if the router needs to generate an LSA for network 10.0.0.0 255.255.0.0 or 10.0.0.0 255.0.0.0.
Dynamic OSPF Activation and Configuration
OSPF is automatically activated when you enable it. The protocol does not require a software reload.
You can configure and save the following OSPF changes without resetting the system:
•
all OSPF interface-related parameters (for example: area, hello timer, router dead time cost, priority, re-
transmission time, transit delay)
•
all area parameters
•
all area range parameters
•
all virtual-link parameters
•
all global parameters
•
creation and deletion of an area, interface or virtual link
In addition, you can make the following changes without a system reset by first disabling and then re-enabling
OSPF operation:
•
changes to address ranges
•
changes to global values for redistribution
•
addition of new virtual links
You also can change the amount of memory allocated to various types of LSA entries. However, these changes
require a system reset or reboot.
Dynamic OSPF Memory
FastIron devices dynamically allocate memory for Link State Advertisements (LSAs) and other OSPF data
structures. This eliminates overflow conditions and does not require a reload to change OSPF memory allocation.
So long as the Layer 3 Switch has free (unallocated) dynamic memory, OSPF can use the memory.
To display the current allocations of dynamic memory, enter the show memory command. See the
Foundry Switch
and Router Command Line Interface Reference
.
Configuring OSPF
To begin using OSPF on the router, perform the steps outlined below:
1.
Enable OSPF on the router.
2.
Assign the areas to which the router will be attached.
3.
Assign individual interfaces to the OSPF areas.
4.
Define redistribution filters, if desired.
5.
Enable redistribution, if you defined redistribution filters.
6.
Modify default global and port parameters as required.
7.
Modify OSPF standard compliance, if desired.
NOTE:
OSPF is automatically enabled without a system reset.
Содержание FastIron Edge Switch X424
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