Cisco Catalyst 6880-X Specifications download pdf (Page 24)

Access Layer April 2014

Step 2: If you are configuring a stack, run the stack-mac persistent timer 0 command. This ensures that the

original stack master MAC address is used by any switch in the stack that takes the stack master role after a

switchover. This command does not apply to the Cisco Catalyst 3560-X Series Switch.

Switch(config)#stack-mac persistent timer 0

The default behavior when the stack master switch fails is for the newly active stack master switch to assign a

new stack MAC address. This new MAC address assignment can cause the network to reconverge because

the link aggregation control protocol (LACP) and many other protocols rely on the stack MAC address and must

restart.

Step 3: For each platform, define two macros that you will use in later procedures to apply the platform specific

QoS configuration. This makes consistent deployment of QoS easier.

macro name AccessEdgeQoS

auto qos voip cisco-phone

macro name EgressQoS

mls qos trust dscp

queue-set 1

srr-queue bandwidth share 1 30 35 5

priority-queue out

Option 2: Congure the Cisco Catalyst 3650 and 3850 platform

Step 1: To configure a Cisco Catalyst 3650 or 3850 stack, use the CLI global exec mode (not configuration

mode) to set the preferred active switch.

switch [switch number] priority 15

When there are multiple Cisco Catalyst 3650 or 3850 Series Switches configured in a stack, one of the switches

takes the role of the active switch. Upon reload, the switch configured with the highest priority assumes the

active role. If this is a new configuration, only the active switch console is active during the initial configuration.

When three or more switches are configured as a stack, configure the active switch functionality on a switch that

does not have uplinks configured.

Step 2: For each platform, define two macros that you will use in later procedures to apply the platform-specific

QoS configuration. This makes consistent deployment of QoS easier.

class-map match-any PRIORITY-QUEUE

match dscp ef cs5 cs4

class-map match-any CONTROL-MGMT-QUEUE

match dscp cs7 cs6 cs3 cs2

class-map match-any MULTIMEDIA-CONFERENCING-QUEUE

match dscp af41 af42 af43

class-map match-any MULTIMEDIA-STREAMING-QUEUE

match dscp af31 af32 af33

class-map match-any TRANSACTIONAL-DATA-QUEUE

match dscp af21 af22 af23

class-map match-any BULK-DATA-QUEUE

match dscp af11 af12 af13

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Cisco Catalyst 6880-X Specifications Page 24