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Cisco Bug: CSCuw31346 - DHCP bindings loaded from persistent storage with incorrect lease time

Last Modified

Feb 12, 2018

Products (1)

  • Cisco ASR 9000 Series Aggregation Services Routers

Known Affected Releases

5.1.3.BASE

Description (partial)

Symptom:
DHCP snooping bindings are seen with Remaining Lease time set to "original remaining lease time" + current time zone after router reload.

If router is in GMT+3 time zone then all bindings will get +3 hours:

Before reload:

RP/0/RSP0/CPU0:syros#show dhcp ipv4 snoop binding
Wed Sep 16 22:41:52.256 CEST

  MAC            IP Lease                                       Bridge
  Address        Address         State      Remaining Interface                        Domain
-------------- --------------- ---------- ---------- -------------------------------- ----------------------
a89d.2105.8303 192.168.0.12    BOUND *15688* Gi0/0/0/1 vyashin_repro_sr_680125955:vyashin_repro_sr_680125955

After reload it's +3 hours (10800 seconds):

RP/0/RSP0/CPU0:syros#show dhcp ipv4 snoop binding
Wed Sep 16 22:59:23.285 CEST*<<<<<< +18 min*

  MAC            IP Lease                                       Bridge
  Address        Address         State      Remaining Interface                        Domain
-------------- --------------- ---------- ---------- -------------------------------- ----------------------
a89d.2105.8303 192.168.0.12    BOUND 25438 Gi0/0/0/1 vyashin_repro_sr_680125955:vyashin_repro_sr_680125955

Conditions:
DHCP snooping persistance is activated. All DHCP snoop bindings are saved into DB on harddisk/disk0 and are
restored from on-disk DB after router reload.
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