Control Plan Policy effecting IPSEC Traffic?

Unanswered Question
Nov 23rd, 2009
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Hello all,

For the past few days I have been watching IPSEC ESP authentication failures on my firewall. The firewall sits behind a Cisco 7200 router which is configured with a UDP control plan policy (below) - DOS protection. The IOS running on the router is Version 12.4(25b). The VPN continues to pass traffic without any problems though. I have a feeling the policy is effecting IPSEC traffic. I'm still doing research. Has anyone witnessed this issue before?

I cleared the UDP ACL counter to see if the counter was incrementing at an abnormal rate. At the moment it is not. How can I reset the control-plane policy counter?

class-map match-all UDP
match access-group name UDP

policy-map Control-Plane
class UDP
police 16000 conform-action transmit  exceed-action drop  violate-action drop

ip access-list extended UDP
permit udp any any

service-policy input Control-Plane



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Laurent Aubert Mon, 11/23/2009 - 19:58
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  • Cisco Employee,


If the tunnel end-point is the FW and not the 7200 then CoPP will not impact your IPSec traffic. CoPP watches only traffic punted to the CPU which is most of the time control-plane traffic destinated to the router itself.




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