Restrictions and limitations
Network load balancing restrictions and limitations:
- You can configure a maximum of 32 NLB cluster IPs. Therefore, the maximum number of ACL table entries that occupy the NLB cluster IP configurations are 2 x 32.
- Only IPv4 NLB cluster IP addresses are supported.
- Any PBR rule with an NLB cluster IP is set as Next Hop or Match parameter does not work if you configure the NLB cluster VLAN with the same IP.
- NLB cluster IP addresses must not overlap across VRFs.
- You cannot configure an NLB VLAN as a virtual-network, private VLAN, FCoE VLAN, or RSPAN VLAN.
- Use the show acl-table-usage detail command to display the hardware ACL entry occupancy per application and per hardware table. Because the PBR and NLB share the same table, the show acl-table-usage detail command output displays ACL entries against the PBR table with the NLB configurations alone.
- You cannot share the NLB cluster IP address with any other switch interface IP address and its subnet. Also, you cannot set an interface IP address that is already in use with the NLB cluster.
EXAMPLE: OS10(conf-if-vl-1301)# nlb-cluster 100.2.1.3 44:44:44:44:44:11 % Error: Invalid IP Address: cannot configure i/f ip address