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

switched ports is at wire speed, since it is looked at as Layer 2 traffic that just happens to be AppleTalk

at Layer 3.

Routing Services

Routing Table Maintenance Protocol (RTMP)

AppleTalk Echo Protocol (AEP)

Name Binding Protocol (NBP)

Datagram Delivery Protocol (DDP)

AppleTalk Address Resolution Protocol (AARP)

Zone Information Protocol (ZIP)

AppleTalk-based filters (see the Filter section below)

2.4 QoS

2.4.1 IEEE 802.3x Flow Control

Both HP ProCurve routing switches adhere to the IEEE 802.3x Flow Control specification. This

provides industry standard support for managing heavy port traffic and helps the routing switch avoid

memory buffer overflows. Flow control is enabled on a port-by-port basis. By default, all ports have

flow control enabled on the HP ProCurve routing switches.

2.4.2 IEEE 802.1p Priority Support

IEEE 802.1p packet tagging supports both designation of VLAN membership (see the VLAN section

below) and packet priority (up to 8 levels). The architecture of the HP ProCurve routing switches

support four levels of priority through multiple priority queues each module keeps. See the priority

queue discussion in the previous section for more details on the handling and mapping of the priority

queues. These priority queues allow the 9304M / 9308M to be responsive to time-sensitive applications

that use the priority field in packet tagging.

Priority of packets can be given specific values based on their inbound port, VLAN affiliation or MAC

address. This allows the network manager to better manage the traffic through the switch, giving

priority to packets that contain time-sensitive data without involvement of the end nodes.

The 9300 routing switches can work in concert with the other HP managed switches to provide an end-

to-end QoS solution. The HP desktop and local backbone switches with firmware code C.07.01

can use the IP address, VLAN affiliation, or IP/TOS (type of service) field of the packet to set a value

for the 802.1q priority bits. As noted above, the 9300 routing switches can read these bits and prioritize

the packets appropriately through the routing switch. Through the combination of the HP desktop and

local backbone switches, and the 9300 routing switches, packet priorities can be established end-to-end

in the local LAN environment without any end node interaction.

2.4.3 Multicast Support

The routing switches support three areas of multicast packet management, DVMRP, PIM and IGMP.

DVMRP and PIM are routing protocols used to set up the route trees through the network for multicast

groups when multiple routes exist. IGMP is used where there are not multiple paths, such as at Layer 2

or in a single or dual router environment, and can work in conjunction with either DVMRP or PIM,

since these protocols will establish a single path for any one multicast stream. DVMRP and PIM, each

tied to different ports, can run concurrently in the same routing switch.

2.4.3.1 DVMRP

Distance Vector Multicast Routing Protocol (DVMRP) is a protocol similar to RIP in that builds its own

multicast routing table in conjunction with other routers in the network. DVMRP uses this table to

Available June 1, 1999. Available for download at no cost to present switch owners.

Revision 4.0 – 4/1/1999

or later

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