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Cisco Bug: CSCte01410 - lost packests between FWSM and engine when switchover by SSO

Last Modified

Feb 01, 2017

Products (1)

  • Cisco IOS

Known Affected Releases


Description (partial)


7304----(vlan12)7609-1(vlan211-out--fwsm--in-vlan201)----7609-2(no fwsm,vlan201)
Customer found lost packets (lost 2 packets in 5000 packets) after switchover 
engine and ospf neighbor up.  When standby engine up (about 7 min), the lost 
packets would disappear.  Customer use the SSO redundancy mode. FWSM NP logs 
are not showing drop, none of the np drop counters are incremented and ICMP 
counters are showing full count.  lost packets no regular,change ospf to
static, same problem.

The problem happened in 7609 with FWSM module when engine switchover.  SSO, RPR
plus have same problem. RPR no issue.
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