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Cisco Bug: CSCuj44237 - GETVPN Suite-B OVERLAPPING IV RANGES: ACL changed back to initial ACL

Last Modified

Feb 13, 2018

Products (1)

  • Cisco ASR 1000 Series Aggregation Services Routers

Known Affected Releases

15.3(3)M 15.3(3)S 15.4(0.26)T0.1 15.4(1)S 15.4(1.4)T

Description (partial)

Symptom: With Suite-B configured, that is, esp-gcm / esp-gmac transform on a GETVPN Key Server (KS), Group Members (GM) will see the "*** SERIOUS ERROR: OVERLAPPING IV RANGES DETECTED ***" un-gated error message on the console when the following is done:

(1) GM registers to KS and downloads ACL1
(2) KS configures ACL2 which is a subset of ACL1
(3) KS issues "crypto gdoi ks rekey" & GM receives rekey successfully, downloading ACL2
(4) KS configures the original ACL1 again
(5) KS issues "crypto gdoi ks rekey" & GM the error message is seen

After this, the GM begins to re-register.
Conditions: Suite-B is configured, that is, esp-gcm / esp-gmac transform on a GETVPN Key Server (KS) with GM's registered

The KS policy ACL is changed from ACL1 to ACL2 (where ACL2 is a subset of ACL1) & a rekey is sent from the KS using "crypto gdoi ks rekey"

The KS policy ACL is reset back from ACL2 to ACL1 & a rekey is sent from the KS using "crypto gdoi ks rekey"
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