Cisco 2950 - Catalyst Switch Spezifikationen PDF herunterladen (Seite 243)

2-217

Catalyst 2950 and Catalyst 2955 Switch Command Reference

OL-10102-02

Chapter 2 Catalyst 2950 and 2955 Cisco IOS Commands

mls qos trust

If DSCP is trusted, the DSCP field of the IP packet is not modified. However, it is still possible that the

CoS value of the packet is modified (according to the DSCP-to-CoS map).

If CoS is trusted, the CoS of the packet is not modified, but DSCP can be modified (according to the

CoS-to-DSCP map) if it is an IP packet.

To return a port to the untrusted state, use the no mls qos trust interface configuration command.

The trusted boundary feature prevents security problems if users disconnect their PCs from networked

Cisco IP phones and connect them into the switch port to take advantage of trusted CoS settings. You

must globally enable the Cisco Discovery Protocol (CDP) on both the switch and on the interface

connected to the IP phone. If the phone is not detected, trusted boundary disables the trust setting on the

switch port and prevents misuse of a high-priority queue.

If trusted boundary is enabled and the no mls qos trust command is entered, the port returns to the

untrusted state and cannot be configured to trust if it is connected to a Cisco IP phone.

To disable trusted boundary, use the no mls qos trust device interface configuration command.

In software releases earlier than Cisco IOS Release 12.1(11)EA1, the switch is in pass-through mode. It

uses the CoS value of incoming packets without modifying the DSCP value and sends the packets from

one of the four egress queues. You cannot enable or disable pass-through mode if your switch is running

a software release earlier than Cisco IOS Release

12.1(11)EA1.

In Cisco IOS Release 12.1(11)EA1 or later, pass-through mode is disabled by default. The switch assigns

a CoS value of 0 to all incoming packets without modifying the packets. It offers best-effort service to

each packet regardless of the packet contents or size and sends it from a single egress queue.

You can enable pass-through mode on a switch running Cisco IOS Release 12.1(11)EA1 or later by using

the mls qos trust cos pass-through dscp interface configuration command. To disable pass-through

mode, use the no mls qos trust cos pass-through interface configuration command.

Note In software releases earlier than Cisco IOS Release 12.1(11)EA1, the mls qos trust command is

available only when the switch is running the EI.

Examples This example shows how to configure a port to be a DSCP-trusted port:

Switch(config)# interface gigabitethernet0/1

Switch(config-if)# mls qos trust dscp

This example shows how to specify that the Cisco IP phone is a trusted device:

Switch(config)# interface fastethernet0/1

Switch(config-if)# mls qos trust device cisco-phone

This example shows how to configure the interface to trust the CoS of incoming packets and to send them

without modifying the DSCP field:

Switch(config)# interface fastethernet0/1

Switch(config-if)# mls qos trust cos pass-through dscp

You can verify your settings by entering the show mls qos interface privileged EXEC command.

1 2 ... 238 239 240 241 242 243 244 245 246 247 248 ... 673 674

Kommentare zu diesen Handbüchern

Keine Kommentare

Snapper ESS5220E Bedienungsanleitung (26 Seiten)

Marke: Snapper | Kategorie: Snow throwers | Größe: 0.43 MB |

Englisch

Inhaltsverzeichnis

Parts Manual fo

1

Table Of Content

3

PAGE GROUP

3

Handle Assembly Group

4

Body Covering Group

6

Auger and Housing Group

8

Chute System Group

10

Frame and Fuel Tank Group

14

Engine Drive System Group

16

Electric Starter Group

18

Wheel Assembly Group

20

Decals Group

22

Weitere Produkte und Handbücher für Schneewerfer Snapper

Modelle	Dokumententyp
SX5200R	Bedienungsanleitung Snapper SX5200R User's Manual, 16 Seiten
2392	Bedienungsanleitung Snapper 2392 User's Manual, 4 Seiten
LE	Bedienungsanleitung Snapper LE User's Manual, 2 Seiten
175246E	Bedienungsanleitung Snapper 175246E User's Manual, 32 Seiten
ES50220E (7800083)	Bedienungsanleitung Snapper ES50220E (7800083) User's Manual, 26 Seiten
L1226E	Bedienungsanleitung Snapper L1226E User's Manual, 36 Seiten
L1226E	Bedienungsanleitung Snapper L1226E User's Manual [en] , 30 Seiten
2418	Bedienungsanleitung Snapper 2418 User's Manual, 4 Seiten
L1428E	Bedienungsanleitung Snapper L1428E User's Manual, 2 Seiten
C3203	Bedienungsanleitung Snapper C3203 User's Manual, 24 Seiten
11528	Bedienungsanleitung Snapper 11528 User's Manual, 32 Seiten
E11305	Bedienungsanleitung Snapper E11305 User's Manual, 24 Seiten
EI55224	Bedienungsanleitung Snapper EI55224 User's Manual, 24 Seiten
LE3171R	Bedienungsanleitung Snapper LE3171R User's Manual, 18 Seiten
LE3190E	Bedienungsanleitung Snapper LE3190E User's Manual, 16 Seiten
11306	Bedienungsanleitung Snapper 11306 User's Manual [en] , 25 Seiten