HP ProCurve Routing Switch 9308M / 9304M Reviewer’s Guide

2.3 Layer 3 Services

Routing for both IP and IPX is done in ASIC hardware at wire speed. AppleTalk routing is done by the processor at a rate up to 300,000 pps. Routing services can be applied two different ways:

•The router is directly assigned to specific ports – these ports look like traditional router ports, where each port is in its own IP subnet or IPX network

•A group of ports are assigned to a VLAN and tied to a virtual router interface inside the routing switch – externally these ports are switched together (since they are in the same VLAN) and are all in the same IP subnet or IPX network. Internal to the routing switch they are tied to the routing service through the virtual router port without the loss of an external port. Groups of these VLANs can communicate with each other through their virtual internal router interfaces. Sixty virtual router interfaces are allowed in the 9304M, 180 in the 9308M.

The use of router virtual interfaces provides a high degree of flexibility with the routing switch and is called Integrated Switch Routing (ISR).

2.3.1 IP

Since there is no performance degradation, IP routing is, by default, enabled on the HP ProCurve routing switches. Some of the IP services available are:

•Routing Services

•RIP (version 1, version 1 compatible version 2, and version 2)

•Split Horizon and Poison Reverse supported

•Redistribution (importing of OSPF or static routes into the RIP route table)

•OSPF (RFC 1583 and 2178 compliant)

•Load sharing of equal cost paths

•Redistribution (importing of RIP or static routes into the OSPF route tables)

•OSPF traps (RFC 1850)

•Static IP routes (64 maximum per chassis)

•IRDP (ICMP Router Discovery Protocol)

•Proxy ARP and RARP

•Bootp Relay Service

•UDP broadcast forwarding (UDP Helper)

•Encapsulation type: Ethernet II (default) or SNAP

•DNS Resolver (allows users to use host name rather than IP address for services such as Telnet, ping or trace route.)

•Extensive IP-based filtering available (see the Filtering section)

2.3.2 IPX

•Routing services: RIP/SAP

•Four encapsulation types: Ethernet SNAP, Ethernet 802.2, Ethernet 802.3 and Ethernet II

•NetBIOS broadcast routing support

•IPX filters (see the Filtering section)

2.3.3 AppleTalk

The HP ProCurve routing switches support AppleTalk Phase II. AppleTalk is processor-based in the 9304M and 9308M. Performance is up to 300,000 packets per second. If multiple ports are being switched together and then routed for AppleTalk through a virtual interface to these switched ports, the 300,000 pps rate is for traffic through the virtual interfaces into the router. Traffic across the

©1999 Hewlett-Packard Company

Revision 4.0 – 4/1/1999

Page: 11 of 27