Avaya Cajun P550R Istruzioni per l'installazione e il funzionamento

User Guide Addendum for the Avaya

P550R and P880 Multiservice Switches,

Software Version 5.3.2

Overview

This addendum provides information and procedures that will be

added to later versions of the user documentation. Version 5.3.2 of

the application software is supported only by the M5501R-SUP

(P550R) and M5500R-SUPA (P880) supervisor modules.

This addendum is updated periodically with new information. To

download the most current version of this document, see the http://

support.avaya.com. Click Product Documentation.

This addendum includes the following topics:

■New Software Features on page 1

■Configuring Short-Lived IP Protocol Filters on page 2

■Documentation Updates and Corrections on page 5

■Technical Support on page 13

■Documentation Feedback on page 13

New Software Features

Version 5.3.2 provides support for the following new software

feature:

■Short-lived protocol filters. This feature helps conserve the

forwarding engine resources of the switch. By using a short-

lived protocol filter, you can set the switch to use the slow

User Guide Addendum for the Avaya P550R and P880, v5.3.2

2 January 7, 2003 Part No. 610-0229-091

path to route packets of a specific short-lived protocol. And

by using the slow path to route short-lived protocol traffic,

you conserve the resources of the forwarding engines.

For information on how to configure short-lived protocol

filters, see "Configuring Short-Lived IP Protocol Filters" on

page 2.

Configuring Short-Lived IP Protocol Filters

Overview

This feature helps conserve the forwarding engine resources of the

switch. Depending on the configuration of your network, the

forwarding cache may contain a high number of entries for short-

lived protocols, for example, DNS and NTP. These short-lived

protocol entries consume resources that could otherwise be used for

data traffic of other protocols such as FTP, Telnet, HTTP, RealAudio,

and online games.

If the forwarding cache contains a high number of short-lived

protocol entries, you can set the switch to use the slow path to route

packets of a specific short-lived protocol. By using the slow path to

route short-lived protocol traffic, you conserve the resources of the

forwarding engines, which provide the fast in band routing engine

(FIRE) and fast out of band routing engine (FORE). For information

about the slow path and FIRE and FORE paths, see “Routing

Overview” in Chapter 1, “Introduction,” of the Avaya P550R, P580,

P880, and P882 Multiservice Switch User Guide, Version 5.3.1.

To configure short-lived protocol filters, your user account must be

assigned one of the following access types:

■Read-write

■Administrator

■Custom access type that has read-write permission for the

routing feature

You can configure short-lived IP protocol filters only by using the

CLI. This feature is not available in the Web Agent or SNMP.

Doc. No. 650-100-702

Part No. 610-0229-091 January 7, 2003 3

Enabling a Short-Lived IP Protocol Filter

Overview If you enable a filter for a short-lived IP protocol, the switch uses the

slow path to route packets of the protocol. For information about

the slow path, see “Routing Overview” in Chapter 1, “Introduction,”

of the Avaya P550R, P580, P880, and P882 Multiservice Switch User

Guide, Version 5.3.1.

By default a filter is enabled for DNS and NTP packets. To route the

packets of other short-lived protocols by means of the slow path,

you must enable a filter for the protocol.

Command To enable a filter for a short-lived IP protocol, enter Global

Configuration mode and use the following command:

ip short-lived {tcp | udp} <port>

Examples To send all SNMP packets to supervisor module for slow path

routing, enter the following command:

ip short-lived udp 161

To send all BOOTP and DHCP packets to the supervisor for slow path

routing, enter the following command:

ip short-lived udp 67

ip short-lived udp 68

Disabling a Short-Lived IP Protocol Filter

Overview If you disable a filter for a short-lived IP protocol, the switch uses

either the fast in band routing engine (FIRE) path or the fast out of

band routing engine (FORE) path to route packets of the protocol.

Table 1. Keywords, Arguments, and Options

Keyword, Argument,

or Option

Definition

{tcp | udp} Enter tcp if the protocol that you want to

filter uses a TCP port.

Enter udp if the protocol that you want

to filter uses a UDP port.

<port> The TCP or UDP port number that the

protocol uses. Enter a port number from

0 through 65535.

User Guide Addendum for the Avaya P550R and P880, v5.3.2

4 January 7, 2003 Part No. 610-0229-091

For information about the FIRE and FORE paths, see “Routing

Overview” in Chapter 1, “Introduction,” of the Avaya P550R, P580,

P880, and P882 Multiservice Switch User Guide, Version 5.3.1.

Command To disable the filter for a short-lived IP protocol, enter Global

Configuration mode and use the following command:

no ip short-lived {tcp | udp} <port>

Examples To disable the short-lived IP protocol filter for DNS, enter the

following command:

no ip short-lived udp 53

To disable the short-lived IP protocol filter for NTP, enter the

following command:

no ip short-lived udp 123

Displaying Short-Lived IP Protocol Filters

Command To display the short-lived IP protocol filters that are currently

enabled, enter Global Configuration mode and use the following

command:

show ip short-lived

Example After you enter the show ip short-lived command, the switch

displays the filters that are currently enabled. For example:

ip short-lived tcp 112

ip short-lived udp 53

ip short-lived udp 123

Table 2. Keywords, Arguments, and Options

Keyword, Argument,

or Option

Definition

{tcp | udp} Enter tcp if the protocol that you want to

filter uses a TCP port.

Enter udp if the protocol that you want

to filter uses a UDP port.

<port> The TCP or UDP port number that the

protocol uses.

Doc. No. 650-100-702

Part No. 610-0229-091 January 7, 2003 5

Documentation Updates and Corrections

The following information will be added or changed in the next

revision of the documentation for the Avaya P550R and P880

Multiservice switches.

Avaya P550R, P580, P880, and P882 Multiservice Switch User

Guide

Using the Web

Agent to

Configure the

Switch

The following note will be added to “Configuring the Switch Using

the Web Agent” in Chapter 2, “Initialize and Setup.”

* Note: Use of Microsoft Internet Explorer Version 6.0 with

Service Pack 1 is not currently supported.

Creating IP Static

Routes

The following statement will be added to “Creating a Static Route”

in Chapter 9, “Configuring IP Routing.”

* Important: Do not create a static route to a local interface. This

configuration is not supported.

Protocol Event Log The following note will be added to “Configuring the Protocol Event

Log” in Chapter 17, “Monitoring the Avaya Multiservice Switch.”

* Important: If enabled, protocol event logging displays system

messages that help Avaya Technical Support

troubleshoot network problems.

Avaya recommends that logging of protocol events

be enabled only during troubleshooting sessions. If

protocol event logging is enabled during normal

network operation, the switch may display messages

that users may incorrectly interpret as indications of

protocol failures. For more information on advanced

troubleshooting, see Chapter 17, “Monitoring the

Avaya Multiservice Switch,” in the Avaya P550R,

P580, P880, and P882 Multiservice Switch User

Guide, Version 5.3.1.

VTP Snooping The following note will be added to “Configuring VLAN Trunk

Protocol (VTP) Snooping” in Chapter 4, “Using VLANs, Spanning

Tree, Hunt Groups, and VTP Snooping.”

* Note: When VTP Snooping creates VLANs on the Avaya

Multiservice switches, the hash table size for the VLANs

User Guide Addendum for the Avaya P550R and P880, v5.3.2

6 January 7, 2003 Part No. 610-0229-091

is automatically set to 64. Depending on the number of

VLANs that are created, you may need to manually

change this hash table setting. For information on the

relationship between hash table sizes and the number of

VLANs that are configured on the switch, see

“Relationship between VLANs, AFT, and Hash Table

Sizes,” in Chapter 6, “Managing the Address Forwarding

Table.”

Remote Fault

Detection

The following information will be added to “Configuring Physical

Port Parameters on Gigabit Ports” in Chapter 5, “Configuring Port

Parameters.”

Remote fault detection is a proprietary feature that prevents a loss of

traffic if a physical or signaling error occurs on a switch-to-switch

fiber link.

A remote fault is an error that one switch can detect but the other

switch cannot. For example, if a transmit fiber breaks, the remote

port continues to receive data and so detects that the link is good.

However, the remote port cannot detect that the data it transmits is

not received by the local port.

If remote fault detection is enabled and a remote fault occurs, the

local switch sends a message to inform the remote switch of the

fault. The remote switch then shuts down the remote port.

If the receive signal is restored on the local port, the local port sends

a message to the remote switch, which then turns on the remote

port again.

* Important: Remote fault detection must be enabled on both the

local port and remote port for the feature to work.

For example, in Figure 1:

1. Port 1 on Switch A is not receiving traffic from Port 2 on

Switch B.

This problem could occur because:

—The transmitter on port 2 is not functioning.

—The receiver on port 1 is not functioning.

—The fiber is broken or disconnected.

Doc. No. 650-100-702

Part No. 610-0229-091 January 7, 2003 7

2. Switch A detects the error condition and sends a message to

Switch B, which shuts down Port 2. (When the port is shut

down, its status changes from Okay to No Link. The port

status is displayed in the Status field of the Physical Port

Configuration Web page.)

Figure 1. Remote fault detection

Enable remote fault detection on both ends of a switch-to-switch

connection, in the following two cases:

■When two Gigabit ports that do not support auto-negotiation

are connected.

■When a Gigabit port that supports auto-negotiation is

connected to a Gigabit port that does not support auto-

negotiation.

For a list of Gigabit modules that do not support auto-negotiation,

see Table 5-3, “Gigabit Modules Not Supporting Autonegotiation.”

Restrictions:

■Autonegotiation and remote fault detection cannot be

enabled at the same time. To enable remote fault detection,

autonegotiation must be disabled. When autonegotiation is

enabled, remote fault detection is automatically disabled.

■If the switch is operating in Fabric mode 1, 80-series Gigabit

modules support remote fault detection on only one port. If

you enable remote fault detection on more than one port, a

loss of traffic occurs.

If the switch is operating in Fabric mode 2, 80-series Gigabit

modules support remote fault detection on two ports;

however, the ports must be on different fabric ports. If you

enable remote fault detection on two ports that are on the

same fabric port, a loss of data occurs. For information on the

relationship between fabric ports and physical ports, see

“How Hunt Groups Load Share” in Chapter 4, “Using VLANs,

Spanning Tree, Hunt Groups, and VTP Snooping.”

50-series modules support remote fault detection on any

number of ports.

Switch A,

Port 1

Switch B,

Port 2

TxRx

Tx Rx

User Guide Addendum for the Avaya P550R and P880, v5.3.2

8 January 7, 2003 Part No. 610-0229-091

Command Reference Guide for the Avaya P550R, P580, P880,

and P882 Multiservice Switches

clear tcp The clear tcp command will be added to Chapter 10, “IP.”

Command Mode: Global Configuration.

Description: Ends the TCP session that you specify.

Syntax: clear tcp [all | local <local-ip-address> <local-tcp-port> remote

<remote-ip-address> <remote-tcp-port>

Systems: Avaya P550R, P580, P880, and P882 Multiservice

switches.

set debug The set debug command will be added to Chapter 31, “User

Interface.”

Command Mode: Global Configuration.

Description: Enables or disables debug mode. If enabled, this mode

displays system messages that help Avaya Technical Support

troubleshoot network problems.

Keyword, Argument,

or Option

Definition

all Ends all TCP sessions on the switch.

local Ends a specific TCP session on the local

switch.

<local-ip-address> The local IP address for which you want

to end the TCP session.

<local-tcp-port> The local TCP port number for which you

want to end the TCP session.

remote The associated TCP session on the remote

switch.

<remote-ip-address> The associated remote IP address for

which you want to end the TCP session.

<remote-tcp port> The associated remote TCP port number

for which you want to end the TCP

session.

Doc. No. 650-100-702

Part No. 610-0229-091 January 7, 2003 9

* Important: Avaya recommends that debug mode be enabled

only during troubleshooting sessions. If debug mode

is enabled during normal network operation, the

switch may display messages that users incorrectly

interpret as indications of system failures. For more

information on advanced troubleshooting, see

Chapter 17, “Monitoring the Avaya Multiservice

Switch,” in the Avaya P550R, P580, P880, and P882

Multiservice Switch User Guide, Version 5.3.1.

By default, this mode is disabled.

Syntax: set debug {on | off}

Systems: Avaya P550R, P580, P880, and P882 Multiservice

switches.

show custom-

access-type

Command Mode: User.

Description: Displays the custom access types that are currently

configured on the switch.

Syntax: show custom-access-type

Sample Output: The following example displays the custom access

types that are currently configured on a switch:

Avaya>show custom-access-type

Keyword, Argument,

or Option

Definition

on Enables debug mode.

off Disables debug mode.

Type Name

----------------

Sys

Cfg.

----

Mod

Port

Cfg.

----

Event

Mgmt.

-----

Switching

---------

Routing

-------

admin + + + + +

CAT1 - + - + -

User Guide Addendum for the Avaya P550R and P880, v5.3.2

10 January 7, 2003 Part No. 610-0229-091

Systems: Avaya P550R, P580, P880, and P882 Multiservice

switches.

snmp-server

community

The following text replaces the text in “snmp-server community” of

Chapter 25, “SNMP.”

Command Mode: Global Configuration.

Description: Sets up an SNMP community string. SNMP

community strings control a management station's access to MIB

objects.

For more information about setting up SNMP communities, see

Chapter 2, “Initialize and Setup,” in the Avaya P550R, P580, P880, and

P882 Multiservice Switch User Guide, Version 5.3.1.

Syntax:

To Create:snmp-server community <community-string> {ro | rw | none} [{normal |

admin | <catName>}] [<ip-addr>]

To Delete: [no] snmp-server community <community-string>

Table 3. New Keywords, Arguments, and Options

Keyword, Argument,

or Option

Definition

<community-string> The SNMP community string that you

want to configure.

{ro | rw | none} The permission that you want to assign

to the community string. Options are:

• ro—Specifies read-only permission.

Allows authorized management

stations only to view MIB objects.

• rw—Specifies read-write

permission. Allows authorized

management stations to view and

modify MIB objects.

• none—Specifies no permission.

Allows management stations to

neither view or modify MIB objects.

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