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Cisco Bug: CSCur35982 - LISP xTR doesn't register eid prefix if the prefix is unreachable

Last Modified

Sep 11, 2019

Products (8)

  • Cisco Nexus 7000 Series Switches
  • Cisco Nexus 7000 10-Slot Switch
  • Cisco Nexus 7000 4-Slot Switch
  • Cisco Nexus 7700 6-Slot Switch
  • Cisco Nexus 7700 18-Slot Switch
  • Cisco Nexus 7000 18-Slot Switch
  • Cisco Nexus 7000 9-Slot Switch
  • Cisco Nexus 7700 10-Slot Switch

Known Affected Releases


Description (partial)

LISP xTR doesn't register eid prefix, even though more specific prefixes exist in the routing table. We should be registering the prefixes. which have more specific prefixes reachable as well.

See example:

R2# show ip lisp database
LISP ETR IP Mapping Database for VRF "default" (iid 0), global LSBs:

EID-prefix:, instance-id: 0, LSBs: 0x00000001, no-route
  Locator:, priority: 10, weight: 100
           Uptime: 00:04:32, state: up, local
R2# show ip route
IP Route Table for VRF "default"
'*' denotes best ucast next-hop
'**' denotes best mcast next-hop
'[x/y]' denotes [preference/metric], ubest/mbest: 2/0
    *via, Eth2/1, [110/20], 00:10:01, ospf-1, type-2
    *via, Eth2/1, [110/20], 00:10:01, ospf-1, type-2

In this case should still be registered to the mapping-system, even though no route exists in the rib.
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