Cisco Catalyst 4500 Series, Руководство по настройке программного обеспечения

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Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
Chapter 5 Configuring Virtual Switching Systems
Configuring a VSS
When you configure fast hello dual-active interface pairs, note the following information:
• You can configure a maximum of four interfaces on each chassis to connect with the other chassis
in dual-active interface pairs. Attempting to configure more than four interfaces causes an error
message to display (and your command is rejected).
•
Each interface must be directly connected to the other chassis and must not be a VSL link. We
recommend using links from a switching module not used by the VSL.
• Each interface must be a physical port. Logical ports such as an SVI are not supported.
•
The fast-hello links are Layer 2 ports.
• Configuring fast hello dual-active mode automatically removes all existing configuration from the
interface and restricts the interface to fast hello dual-active configuration commands. It can only be
used for “fast-hello” traffic.
•
Unidirectional link detection (UDLD) is disabled on fast hello dual-active interface pairs.
• Do not configure fast-hello ports on an oversubscribed line card. Doing so might lead to a loss of
fast-hello messages, impacting the functionality of fast-hello based dual-active detection.
This example shows how to configure an interface for fast hello dual-active detection:
Switch(config)#
switch virtual domain 255
Switch(config-vs-domain)# dual-active detection fast-hello
Switch(config-vs-domain)# exit
Switch(config)#
interface fastethernet 1/2/40
Switch(config-if)# dual-active fast-hello
WARNING: Interface FastEthernet1/2/40 placed in restricted config mode. All extraneous
configs removed!
Switch(config-if)# no shutdown
Switch(config-if)# exit
Switch(config)#
exit
Switch# show run interface fastethernet 1/2/40
interface FastEthernet1/2/40
switchport mode access
switchport nonegotiate
dual-active fast-hello
no switchport
no ip address
dual-active fast-hello
end
Displaying Dual-Active Detection
To display information about dual-active detection, perform this task:
This example shows how to display the summary status for dual-active detection:
Switch# show switch virtual dual-active summary
Switch(recovery-mode)# show switch virtual dual-act summary
Pagp dual-active detection enabled: Yes
In dual-active recovery mode: Yes
Triggered by: PagP
Triggered on Interface: Gi1/3/11
Command Purpose
Switch#
show switch virtual [ dual-active { pagp |
fast-hello | summary } | link [ counters | detail |
port-channel | ports ] | redundancy | role | slot-map ]
Displays information about dual-active detection
configuration and status.