dhcpv6–snooping max-bindings

Syntax

[no] dhcpv6-snooping max-bindings <PORT-LIST 1-8192>

Description

Configure the maximum number of binding addresses allowed per binding anchor. A binding anchor is a unique attribute that can be associated with a client address.

Parameters and options

max-bindings

Configuring maximum number of binding addresses allowed per port.

  • If the max-bindings value is configured before enabling dhcpv6-snooping the limit is immediately applied and the bindings are not allowed to exceed the max-bindings value.

  • The max-bindings value is setafter enabling dhcpv6-snooping.

  • The current bindings are greater than the max-binding value, the configuration will be applied as and when clients release their IPv6 addresses.

  • Current bindings are lesser than that of the value entered, the configuration will be immediately applied.

<PORT-LIST 1-8192>

Specify the ports on which max-bindings need to be applied in the range of 1–8192.

Validation rules

Validation

Error/Warning/Prompt

Verify max-bindings value entered is in the range

Invalid input: <value>

If DHCPv6-Snooping is already configured before entering the command and current bindings are greater than the value being set.

Existing bindings %d are more than the max-bindings being configured, and the maximum limit will be applied once the number of existing bindings fall below this limit

If the value is being configured for a trusted port

Cannot configure maximum binding for DHCPv6 snooping feature on a trusted port

If the value is being configured for a port which is not a part of a dhcpv6-snooped vlan

Port %s is not a part of a DHCPv6-snooping VLAN.

If the max-binding value is being set for a Dynamic trunk.

Cannot configure DHCPv6 Snooping on a port when Dynamic Trunking is enabled on that port.

If the number of static bindings is greater than the max-binding value being set.

Cannot configure the maximum binding value because the number of static bindings on the port exceeds the maximum binding value.

If a port on which max-binding is enabled is being put into a trunk.

Cannot add a port to a trunk group when DHCPv6 Snooping Maxbinding is configured on that port.

If a trunk has max-bindings configured on it. And the trunk is being removed.

Cannot remove the port %s from the trunk group because DHCPv6 Snooping max-binding is configured on the trunk and removing the port will delete the trunk.

If DT trunk is being configured on a max-binding enabled port.

Cannot configure Distributed Trunking on a port when DHCPv6 Snooping max-binding is configured on that port.

IMPORTANT:

DT trunks can use jumbo VLAN as usual, but user needs to ensure that jumbo is configured on both the DT pairs, otherwise packet drops/fragmentations can be seen.