You cannot use the switch current-stack-member-number renumber new-stack-member-numberĬommand on a provisioned. If the number is being used by another member in the stack, the selects the lowest available number in the stack.Ĭhange the number of a stack member and no interface-level configuration isĪssociated with that new member number, that stack member resets to its default Another way toĬhange the stack member number is by changing the _NUMBER environment variable. If you manually change the stack member number by using the switch current-stack-member-number renumber new-stack-member-numberĬommand, the new number goes into effect after that stack member resets (or after you use the reload slot stack-member-number privileged EXEC command) and only if that number is not already assigned to any other members in the stack. Every stack member, including a standalone, retains its member number until you manually change the number or unless the number is already being used by another member Stack members in the same stack cannot have the same stack member number. When it joinsĪ stack, its default stack member number changes to the lowest available member number in the stack. You can display the stack member numberĪ new, out-of-the-box (one that has not joined a stack or has not been manually assigned a stack member number) ships with a default stack member number of 1. The member number also determines the interface-levelĬonfiguration that a stack member uses. The stack member number (1 to 8) identifies each member in the You can use the stack-mac update force command to resolve the conflict. If you want the switch stacks to remain separate, change the IP address or addressesĪ MAC address conflict between two members in the stack. Removing powered-on stack members causes the switch stack to divide (partition) into two or more switch stacks, each withĪn IP address conflict in your network. The stack configuration of the reelected stack master. They change their stack member numbers to the lowest available numbers and use The former stack masters, reload and join the switch stack as stack members. The reelected stack master retains its roleĪnd configuration as do its stack members. (merging) causes the stack masters of the merging switch stacks to elect a Switch stack continues uninterrupted during membership changes unless youĪdd powered-on standalone switches or switch stacks. Hence it is recommended to make the switch which does not contain the uplink ports as teh master in the stack.Member with an identical model, the new switch functions with exactly the sameĬonfiguration as the replaced switch, assuming that the new switch (referred toĪs the provisioned switch) is using the same member number as the replaced Hence, if we configure the switch which has uplinks configured on it as the master in the stack, then it would cause an overhead on the master and may affect the performance of the stack or the uplink ports. Each member stores a copy of the Cisco IOS Software image on its local Flash. The master pushes new Cisco IOS Software images to all members. This way all members have a copy of the saved configuration. On configuration changes, the stack master pushes a copy of the configuration to every member. The response from the master is sent through the stack to the destination interface. Simple Network Management Protocol (SNMP), HTTP, Telnet, and Secure Shell (SSH) Protocol type of management traffic is all forwarded to the master regardless of the ingress interface. The same behavior is seen for management traffic. If the egress interface is on another member, then the protocol packet is passed from the master along the stack to the destination member. The master will also transmit all Layer2 protocol packets. All Layer 2 protocol traffic (for example, VLAN Trunking Protocol, Dynamic Trunking Protocol, Cisco Discovery Protocol, Link Layer Discovery Protocol ) is forwarded to the master regardless of where the protocol packet ingresses. The stack master controls the configuration and is the central point for management. The following details explain the role of the stack master switch which will help us The stack master on a stack would be responsible for managing the stack and relay the information to all the members of the stack. The uplink ports on the switch would be configured as trunk ports and would be carrying the traffic from all vlans.
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