8.5. Packets Egressing a LISP Site

8.5. Packets Egressing a LISP Site

When a LISP site is using two ITRs for redundancy, the failure of one ITR will likely shift outbound traffic to the second. This second ITR's cache may not be populated with the same EID-to-RLOC mapping entries as the first. If this second ITR does not have these mappings, traffic will be dropped while the mappings are retrieved from the mapping system. The retrieval of these messages may increase the load of requests being sent into the mapping system. Deployment and experimentation will determine whether this issue requires more attention.