Routing Between Vlans Using Virtual Routing Interfaces - HP ProCurve 9304M Installation And Configuration Manual

Installation and Basic Configuration Guide
Once a port is re-activated, the aging out period for the port is reset to 20 minutes. Each time a member protocol
packet is received by a candidate dynamic port (aged out port) the port becomes active again and the aging out
period is reset for 20 minutes.
To configure an IPv6 VLAN, enter commands such as the following:
HP9300(config)# vlan 2
HP9300(config-vlan-2)# untag ethernet 1/1 to 1/8
HP9300(config-vlan-2)# ipv6-proto name V6
HP9300(config-ipv6-subnet)# static ethernet 1/1 to 1/6
HP9300(config-ipv6-subnet)# dynamic
The first two commands configure a port-based VLAN and add ports 1/1 – 1/8 to the VLAN. The remaining
commands configure an IPv6 VLAN within the port-based VLAN. The static command adds ports 1/1 – 1/6 as
static ports, which do not age out. The dynamic command adds the remaining ports, 1/7 – 1/8, as dynamic ports.
These ports are subject to aging as described above.
Syntax: [no] ipv6-proto [name <string>]

Routing Between VLANs Using Virtual Routing Interfaces

HP Routing Switches offer the ability to create a virtual routing interface within a Layer 2 STP port-based VLAN or
within each Layer 3 protocol, IP sub-net, or IPX network VLAN. This combination of multiple Layer 2 and/or
Layer 3 broadcast domains and virtual routing interfaces are the basis for Hewlett-Packard's very powerful
Integrated Switch Routing (ISR) technology. ISR is very flexible and can solve many networking problems. The
following example is meant to provide ideas by demonstrating some of the concepts of ISR.
Example: Suppose you want to move routing out to each of three buildings in a network. Remember that the only
protocols present on VLAN 2 and VLAN 3 are IP and IPX. Therefore, you can eliminate tagged ports 25 and 26
from both VLAN 2 and VLAN 3 and create new tagged port-based VLANs to support separate IP sub-nets and IPX
networks for each backbone link.
You also need to create unique IP sub-nets and IPX networks within VLAN 2 and VLAN 3 at each building. This
will create a fully routed IP and IPX backbone for VLAN 2 and VLAN 3. However, VLAN 4 has no protocol
restrictions across the backbone. In fact there are requirements for NetBIOS and DecNet to be bridged among
the three building locations. The IP sub-net and IPX network that exists within VLAN 4 must remain a flat Layer 2
switched STP domain. You enable routing for IP and IPX on a virtual routing interface only on HP9304-A. This
will provide the flat IP and IPX segment with connectivity to the rest of the network. Within VLAN 4 IP and IPX will
follow the STP topology. All other IP sub-nets and IPX networks will be fully routed and have use of all paths at all
times during normal operation.
Figure 11.12 shows the configuration described above.
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