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NetStructure™ 480T Routing Switch User Guide
5. Turn on RIP or OSPF using one of these commands:
enable rip
enable ospf
Verifying the IP Unicast Routing Configuration
Use the show iproute command to display the current
configuration of IP unicast routing for the switch and for each
VLAN. The
show iproute command displays the currently
configured routes and includes how each route was learned.
The
show iproute display has a special flag for routes that are
active and in use. These routes are preceded by an asterisk (*) in the
route table. If there are multiple routes to the same destination
network, the asterisk will indicate which route is preferred.
The Use and M-Use fields in the route table indicate the number of
times the software routing module is using the route table entry for
packet forwarding decisions.
The Use field indicates a count for unicast routing while the M-Use
field indicates a count for multicast routing. If the use count is going
up in an unexpected manner, this indicates that the software is
making route decisions and may need to be investigated further.
Additional verification commands include:
• show iparp—Displays the IP ARP table of the system.
•
show ipfdb—Displays the hosts that have been transmitting or
receiving packets, and the port and VLAN for each host.
•
show ipconfig—Displays configuration information for one or
more VLANs.
VLAN Aggregation
VLAN aggregation is primarily useful to service providers,
allowing them to increase the efficiency of IP address space usage.
It does this by allowing clients within the same IP subnet to use
different broadcast domains using the same default router.
Using VLAN aggregation:
• A superVLAN is defined with the desired IP address, but without
any member ports (unless it is running ESRP).