If a newly created switch stack does not have an active switch or standby switch, the switch stack will reload and elect a
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 newly elected active switch. All other switches retain their stack member numbers and use
Newly elected active switch retains its role and configuration. The operation of the switch stack continues uninterrupted during membership changes unless you remove the active switch or you add powered-on standalone switches or switch stacks.Īdding powered-on switches (merging) causes all switches to reload and elect a new active switch from among themselves. Replaced switch, assuming that the new switch (referred to as the provisioned switch) is using the same member number as the If you replace a stack member with an identical model, the new switch functions with exactly the same configuration as the In addition, keepalive messages are sent and received between the active and standby es. If the active does not respond, the standby becomes the active. If the standby does not respond, a new standby is elected.
If a stack member does not respond, that member is removed from the stack. Hello messages are sent and received by all stack members.
You can connect standalone to an existing stack to increase the stack membership. You can connect one standalone to another to create a stack containing two stack members, with one of them as the active switch. Each stack member hasĪ current copy of these files for back-up purposes.Ī standalone is a stack with one stack member that also operates as the active switch. The system-level settings for the switch stack and the interface-level settings for each stack member. The active switch contains the saved and running configuration files for the switch stack. Interface-level features for each stack member System-level (global) features that apply to all stack members The active switch controls the operation of the switch stack, and is the single point of stack-wide management. Switch assumes the role of the active switch, and continues to the keep the stack operational. If the active switch becomes unavailable, the standby Layer 2 and Layer 3 protocols present the entire switch stack as a singleĪ switch stack always has one active switch and one standby switch.
Note that Cisco Catalyst 9300L series switches connect through their StackWise-320 ports.The stack members work together as a unified system.
You cannot have a switch stack containing a mix of different license levels.Ī switch stack can have up to eight stacking-capable switches connected through their StackWise -480 ports. It does not have any functional or operational impact. The current state 'NO_NEIGHBOR': rep_lsl_rx Gix/x/x -Traceback= Only homogenous stacking is supported, that is, a stack of Cisco Catalyst 9300 Series Switches stack with only Cisco Catalyst 9300 Series Switches as stack members.Ĭisco Catalyst 9300L Series Switches stack with only Cisco Catalyst 9300L Series Switches as stack members.Ĭ9300-24UB, C9300-24UXB, and C9300-48UB switches can only be stacked with each other.ĭuring a switchover, when the standby device syncs with the active device, the following log message is displayed on the console: %SM-4-BADEVENT: Event 'standby_phy_link_up' is invalid for The following are restrictions for your switch stack configuration:
See the System Management section of this guide.Īll the switches in the switch stack must be running compatible software versions.