Cisco WS-C2916M-XL Manual de usuario descargar pdf (Pagina 6)

Release Notes for the 4-MB Catalyst 2900 Series XL Cisco IOS Release 11.2(8.6)SA6

OL-0332-02

Limitations and Restrictions

IEEE 802.1Q Configuration Considerations

IEEE 802.Q trunks impose some limitations on the trunking strategy for a network. The following

restrictions apply to IEEE 802.1Q trunks:

• Make sure the native VLAN for an IEEE 802.1Q trunk is the same on both ends of the trunk link.

If the native VLAN on one end of the trunk is different from the native VLAN on the other end,

spanning-tree loops might result.

• Disabling STP on the native VLAN of an IEEE 802.1Q trunk without disabling STP on every

VLAN in the network can potentially cause STP loops. We recommend that you either leave STP

enabled on the native VLAN of an IEEE 802.1Q trunk or disable STP on every VLAN in the

network. Make sure your network is loop-free before disabling STP.

Spanning-Tree Maximum Age Command

The range of seconds for the span-tree max-age command is now 6 to 200 seconds. If you use this

command in a previous release to set a value greater than this new range and then upgrade your software

to IOS Release 11.2(8.1)SA6 or later, the switch sets this value to the default: 20 seconds for IEEE STP,

15 seconds for DEC STP, and 10 seconds for IBM STP.

Compatibility with the CiscoWorks2000 RME Suite

When using the Software Image Management (SWIM) application in the Resource Manager Essentials

(RME) suite of CiscoWorks2000 product family to perform automated system software and boot loader

upgrades, Catalyst 2900 series XL switches require IOS Release ll.2(8)SA4 or later and RME version

2.1 or 2.2.

Table 4 Port Conﬁguration Conﬂicts

ATM Port

Port Group

Port

Security

Monitor

Port

Multi-VLAN

Port

Network

Port

Connect to

Cluster?

ATM port –No NoNoNo NoYes

Port group No – No No Yes Yes Yes

Port security No No – No No No Yes

Monitor port No No No – No No Yes

Multi-VLAN port No Yes No No – Yes Yes

Network port

No Yes (only

source-based group)

No No Yes – No

Connect to cluster Yes Yes Yes Yes Yes No –

1. Catalyst 2900 series XL switches only

2. A network port cannot connect cluster members to the command switch.

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