• Before you configure any netwo rk interfaces on this r ou te r, you should first cr eat e
a VLAN for each unique user group, or for e ach netwo rk applica tion and its
associated users. Then assign the ports associated with each of these VLANs.
• An IP address must be ass igne d to gai n m ana gement access over the network or
to connect the switch to existing IP subnets. A specific IP address can be manually
configured, or the router can be directed to obtain an a ddress fr om a BOO TP or
DHCP server. Valid IP addresses consist of four numbers, 0 to 255, separated by
periods. Anything other than this format is not be accepted by th e configur ation
program.
Command Attributes
• VLAN – ID of configured VLAN (1-4093).
•
IP Address Mode
– Specifies whether the IP address for this interface is statically
assigned, or obtained from a network address server. (Options: Static, DHCP -
Dynamic Host Configuration Protocol, BOOTP - Boot Protocol; Default: Static)
- If Static address type is selected, then you must also specify whether the IP
address is the primary IP address on the VLAN or a secondary I P address. An
interface can have only one prima ry IP ad dress, b ut c an h av e mul tiple
secondary IP addresses. In other words, you will need to specify secondary
addresses if more than one IP subnet can accessed via this inte rface.
- If DHCP/BOOTP is enabled, the system will immediately star t broadcast ing
service requests. IP is enabled but do es not functi on until a re ply has be en
received from the address server. Requests will be broadcast periodically by the
router for an IP address. (DHCP/BOOTP values can inclu de the IP addr ess,
default gateway, and subnet mask.)
• IP Address – Address of the VLAN interface. Valid IP addre sses consis t of four
numbers, 0 to 255, separated by periods.
• Subnet Mask – This mask identifies the network portion of the ad dress use d for
routing to specific subnets.
• Secondary – If Static address type is sel ec te d, th e IP address can be the primary
IP address on the VLAN or a secondary IP address. An interface can have only one
primary IP address, but can have multiple secondary IP addresses. In other words,
secondary addresses need to be spec ified if more tha n one IP subnet can be
accessed through this interface.
Note that a secondary address cannot be configured prior to setting the primary IP
address, and the primary address cannot be removed if a secondary address is still
present. Also, if any router in a network segm ent uses a second ary ad dress, a ll
other routers in that segment must also use a secondary addr ess fro m the sam e
network or subnet address space.
19-6
IP Routing
19