Cisco C8510-SRP - Switch Route Processor Installation Guide download pdf (Page 17)

Release Notes for Cisco IOS Release 12.0(10)W5(18c) Feature Packs for the Cisco Catalyst 8500 CSR

78-10598-02

Restrictions

routing other protocol packets. In a switch with a sustained high CPU utilization, turning on AppleTalk

could result in longer convergence times for routing protocols like EIGRP. AppleTalk packet throughput

is dependent on the amount of available CPU processing power.

VLAN Encapsulation Restrictions

The four adjacent ports (such as 0-3 or 4-7) on a 10/100 interface must all use the same VLAN

encapsulation, that is, either 802.1Q and native, or ISL and native.

EtherChannel Restrictions

When assigning Ethernet interfaces to an EtherChannel, all interfaces must be either Fast Ethernet or

Gigabit Ethernet. You cannot mix Fast Ethernet and Gigabit Ethernet interfaces within a single

EtherChannel.

Maximum Path Restriction for EIGRP or OSPF

Catalyst 8500 line modules support a maximum of 2 paths. To improve EIGRP or OSPF convergence,

set the maximum-paths for the router to 2, using the following command:

8500(config)#router eigrp 109

8500(config-router)#maximum-paths 2

Port Snooping Restrictions

The snooping source port and destination port cannot be the same port.

You can only snoop with one source port and one destination port.

Snooping configuration information is not saved in NVRAM.

Eight-Port Gigabit Ethernet — Ports Per Bridge Group Restriction

The Catalyst 8540 8-port Gigabit Ethernet line module can support a maximum of 24 ports per bridge

group.

Eight-Port Gigabit Ethernet — Port Channel Restrictions

If your Catalyst 8540 CSR has an 8-port Gigabit Ethernet line module, you cannot create a port channel

that has some members on that module and others on other modules. All port channel members must

reside on the same Gigabit Ethernet line module.

Also, if your switch router has an 8-port Gigabit Ethernet line module, port channel IDs 57 to 64 are

reserved, and cannot be assigned to other external interfaces. If you assign a port channel ID number

greater than 56, the system will respond with the following message:

Port channel with ID > 56 cannot be created.

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Cisco C8510-SRP - Switch Route Processor Installation Guide Page 17