Network Topology
Traditional network
Problem Description
Enable Voice-VLAN on the switch and got error, not enough resources are available to complete operation.
Process Analysis
- Voi
ce vlan occupies EPCL+IPCL1 ACL resources, check that the device specification for this resource is 256 and 252 are already occupied.
===============display qos-acl resource=============== Interfaces: XGE1/0/1 to XGE1/0/48, FGE1/0/49 FGE1/0/50, FGE1/0/51 FGE1/0/52, XGE1/1/1 to XGE1/1/8 (slot 1) --------------------------------------------------------------------- Type Total Reserved Configured Remaining Usage --------------------------------------------------------------------- TTI ACL 512 0 6 506 1% IPCL0+IPCL2 ACL 1024 103 0 921 10% IPCL Counter 4096 99 0 3997 2% EPCL+IPCL1 ACL 256 0 252 4 98% EPCL Counter 1024 0 0 1024 0% IPCL Meter 1536 0 0 1536 0% EPCL Meter 2048 0 0 2048 0%
- Check that voice-vlan has been invoked on ports 1-28 and that a custom OUI address exists, 9*28=252, not enough resources to keep calling more ports.
Voice VLAN resource usage algorithm:
Number of Voice vlan enabled interfaces * (8 default OUI addresses + custom OUI addresses)
For voice vlan devices support 8 default OUI addresses by default, so an interface with voice vlan enabled will occupy 8 IPCL1 resources
Solution
- If
all ports need to be enabled, it is recommended to enable voice-vlan globally to save ACL resources on the device and after configure it need to reboot the switch
Command: voice-vlan acl-resource-mode global
Note: This command is required to see if the
version is configurable
- If
phones from the same manufacturer are used on site, can use commands to delete useless OUI addresses.
Command: undo voice-vlan mac-address 00e0-bb00-0000