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Cisco Bug: CSCvv09396 - Stale VPN routes for L2TP, after the session was terminated

Last Modified

Oct 06, 2020

Products (1)

  • Cisco ASA 5500-X Series Firewalls

Known Affected Releases

9.12(3) 9.14(1)

Description (partial)

Check the routing table:
V connected by VPN (advertised), outside

- But there is no sessions for that IP, no entries in uauth table, and IP is available in ip-pool.

Next user that is getting assigned with that IP, for which we have that stale route is affected:
# packet tracer input inside icmp <local_host> 8 0 <AnyConnect_IP> detailed
Phase: 11
Subtype: filter-aaa
Result: DROP
Additional Information:
Forward Flow based lookup yields rule:
out id=0x7f6d70accf30, priority=12, domain=filter-aaa, deny=true
hits=1449, user_data=0x7f6d65218300, filter_id=0x0(-implicit deny-), protocol=0
src ip=, mask=, port=0
dst ip=, mask=, port=0
input-interface: inside
input-status: up
input-line-status: up
output-interface: outside
output-status: up
output-line-status: up
Action: drop
Drop-reason: (acl-drop) Flow is denied by configured rule

ASA, standalone, local users auth, local ip-pool
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