A node can receive a Redirect message from an on-link router if the router determines that the destination is on-link or if there is a better first-hop router for the given destination. z/OS® Communications Server can be configured to ignore the IPv6 Redirects sent by routers by defining the IGNOREREDIRECT keyword on the IPCONFIG6 statement. In addition, IPv6 Redirects are ignored if the IPv6 OSPF or IPv6 RIP protocol of the OMPROUTE routing daemon is being used. If processing of Redirect messages is enabled, z/OS Communications Server begins using the new first-hop information which is identified in the Redirect message. A router must use its link-local address as the source address in Redirects that it originates. A received Redirect is processed only if the current route to the destination in the IPv6 route table has the source address of the Redirect as its next hop. Therefore, if Redirects are to be accepted, all static indirect routes must be configured using the next-hop router's link-local address. If the previous route to the destination was a host route, it is deleted from the route table to keep it from being used by Multipath processing.

If Redirect processing is disabled, z/OS Communications Server silently discards the Redirect message.