NetNotes

cable testing на cisco 3750

Catalyst 2960, 2970, 3560/3560-E, и 3750/3750-E суичовете имат вграден Time Domain Reflector (TDR), с който може да се тестват кабелите директно от порта на суича. TDR не се поддържа на 10Gig портове и на SFP-портове.

Пример:

 

SW01#test cable-diagnostics tdr interface gigabitethernet2/1
TDR test started on interface Gi2/1

A TDR test can take a few seconds to run on an interface

Use ’show cable-diagnostics tdr’ to read the TDR results.
SW01#

SW01#sh cable-diagnostics tdr interface gig2/0/11
TDR test last run on: March 02 00:31:15

Interface Speed Local pair Pair length Remote pair Pair status
——— —– ———- —————— ———– ——————–
Gi2/0/11 100M Pair A 47 +/- 4 meters Pair A Normal
Pair B 48 +/- 4 meters Pair B Normal
Pair C 48 +/- 4 meters Pair C Open
Pair D 48 +/- 4 meters Pair D Open
SW01#

Изхода от командата показва освен интерфейса и скоростта, кой локален чифт на кой отдалечен чифт съответства, дължината на чифта, и статуса на чифта:

• Normal;
• Open - несвързан;
• Not Completed - неуспешен tdr тест на интерфейса;
• Not supported - tdr тест не се поддържа на интерфейса;
• Shorted - чифта е свързан накъсо;

Tags: cable testing, Catalyst 3750, Switching, TDR

Port-channel

Имаме следната настройка на port-channel между два Catalyst 3750 - SW1 Gig1/0/1 и Gig1/0/2, комбинирани в port-channel1 са свързани към Gig1/0/1 и Gig1/0/2 на SW2:

SW1:

interface GigabitEthernet1/0/1
description Member of PC1
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 1,2,3,4
switchport mode trunk
switchport nonegotiate
channel-group 1 mode on

interface GigabitEthernet1/0/2
description Member of PC1
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 1,2,3,4
switchport mode trunk
switchport nonegotiate
channel-group 1 mode on

interface Port-channel1
description to SW2
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 1,2,3,4
switchport mode trunk
switchport nonegotiate

SW2:

interface GigabitEthernet1/0/1
description Member of PC1
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 1,2,3,4
switchport mode trunk
switchport nonegotiate
channel-group 1 mode on

interface GigabitEthernet1/0/2
description Member of PC1
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 1,2,3,4
switchport mode trunk
switchport nonegotiate
channel-group 1 mode on

interface Port-channel1
description to SW1
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 1,2,3,4
switchport mode trunk
switchport nonegotiate

За да се формира успешно portchannel интерфейса, всички членове на portchannel-а трябва да имат еднакви: › Continue reading

Tags: port-channel, Switching