Cisco 4510R - Catalyst Switch Manual do Utilizador descarregar pdf (Página 14)

No, the restrictions to only use some uplinks is due to the hardware design of the supervisors.

Therefore, this will not be fixed in any new software releases.

The standby supervisor is not fully booted up. How is the uplink port on it usable?

The hardware is designed so that the standby supervisor is actually controlled by the active supervisor

engine. Therefore, it is usable. The standby supervisor port works even if the standby supervisor is in

ROMmon mode.

•

Standby supervisor uplink port is amber, even though the link is up and in the STP

forwarding state. Is this normal?

In Cisco IOS Software Releases 12.1(12c)EW and 12.1(13)EW, this behavior is expected. Cisco bug

ID CSCea34258 (registered customers only) is filed to track the issue. This is a cosmetic issue and has

no impact on switch performance. It has been resolved in Cisco IOS Software Releases 12.1(19)EW

or later.

•

The active supervisor failed, and there was a switchover. Will the syslog server report this

event?

If there is a syslog server configured, it reports if the active supervisor failed and also reports that the

standby supervisor took over the active one. The syslog server captures the failover information and

detailed events when a failover occurs when you have redundant supervisors.

This scenario applies when the active supervisor was either physically removed or had a software

forced crash, and the standby had to take over as the active supervisor.

•

What is the recommended configuration for a single supervisor setup in a 4507R / 4510R

chassis? Does redundancy need to be disabled in the configuration to prevent problems?

Redundancy need not be disabled in the switch. You can have redundancy enabled and configuration

untouched. This is useful if you decide to have redundancy and put in another supervisor engine; they

automatically synchronize the image and communicate the redundancy. You do not need further

configuration changes. As long as there is only one supervisor engine in the chassis, the switch is in

simplex mode because no other supervisor engine is detected in the chassis.

•

General Considerations When the Active Supervisor in a Redundant

Supervisor Chassis is Removed

Caution should be exercised if you pull out the active supervisor in the dual supervisor scenario. Assume that

you have two supervisors with the supervisor in slot1 active. Based on the previous section, Gigabits 1/1 and

2/1 are active. At this moment, the startup configuration has configurations for both Gigabits 1/1 and 2/1

saved.

If the active supervisor is removed, the standby supervisor becomes active and begins to come online. The

standby supervisor parses the startup configuration and finds that the supervisor in slot 1 does not exist. The

standby supervisor prints an error message that GE 1/1 does not exist.

If you reinsert the supervisor in slot 1, the supervisor is recognized and is in standby mode. However, the

running configuration on the current active supervisor does not have a configuration specific to Gigabits 1/1

or 1/2.

The workaround is to issue the copy start−config running−configuration command in order to copy the

startup configuration to the running configuration.

Note: Do not issue the write memory command before you copy the startup configuration to the running

configuration. This results in default configurations for Gigabits 1/1 and 1/2 written to the startup

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