Cisco Bug: CSCun79878 - Loopback routes for interfaces not cleaned up after interface deletion
Nov 27, 2020
- Cisco IronPort Security Management Appliance Software
Known Affected Releases
Symptom: You may find that an IP address that should otherwise be reachable cannot be reached from your Cisco Content Security Management Appliance (SMA) due to a loopback route for that IP being in the SMA's routing table. The routing table can be viewed using the command: netstat -nr Example output: Routing tables Internet: Destination Gateway Flags Refs Use Netif Expire default 10.3.161.1 UGS 0 1496 Mana~t 10.1.2.3 link#3 UHS 0 0 lo0 10.10.10.0/24 link#2 U 0 1697 Mana~t 10.10.10.1 link#3 UHS 1 1645 lo0 127.0.0.1 link#4 UH 0 24654828 lo0 NOTE: In the above example, the loopback routes are the items that use the lo0 interface. Conditions: This defect is only known to occur after an IP interface had the this IP address is deleted. The reason for this issue is that loopback routes are created for the local IP addresses on the appliance, however, they are not deleted if that IP address is deleted.
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