IES IPv6 IP interfaces provide IPv6 connectivity in the routing base instance. It can be used to connect IPv6 networks over an IPv4 cloud using 6PE mechanisms. For more information about the 6PE, see the 7210 SAS-Mxp, R6, R12, S, Sx, T Router Configuration Guide.
IPv4 and IPv6 route table lookup entries are shared. Before adding routes for IPv6 destinations, route entries in the routed lookup table needs to be allocated for IPv6 addresses. This can be done using the CLI command configure>system>resource-profile>router max-ipv6-routes and configure>system>global-res-profile>max-ipv6-routes for 7210 SAS-R6 and 7210 SAS-R12. This command allocates route entries for /64 IPv6 prefix route lookups. The system does not allocate any IPv6 route entries by default and user needs to allocate some resources before using IPv6. For the command to take effect the node must be rebooted after making the change. For more information, see the following example and the 7210 SAS-Mxp, R6, R12, S, Sx, T Basic System Configuration Guide.
A separate route table (or a block in the route table) is used for IPv6 /128-bit prefix route lookup. A limited amount of IPv6 /128 prefixes route lookup entries is supported. The software enables lookups in this table by default (that is, no user configuration is required to enable IPv6 /128-bit route lookup).
In addition, the number IP subnets can be configured by the user using the command configure>system>resource-profile>router>max-ip-subnets and configure>system>global-res-profile>max-ip-subnet for 7210 SAS-R6 and 7210 SAS-R12. Suitable default are assigned to this parameter. Users can increase the number of subnets if they plan to more IPv6 addresses per IPv6 interface.
Following features and restrictions is applicable for IPv6 IES IP interfaces:
IPv6 interfaces supports static routing, OSPv3, and IS-IS.
A limited amount of IPv6 /128 prefixes route lookup entries is supported on 7210 SAS platforms.