(Apologies for the cross-post - I've not had any responses in LAN Routing & Switching for several days, so trying here, as this is getting to be a quite serious issue for us)
I'm having a rather bizarre and highly annoying problem with static NAT on an ME6524.
I've created a virtual router (VRF CORPNET) which has one physical L3 interface, one SVI and one Loopback.
This Virtual router has the sole purpose of NATing our internet-addressable IP addresses to another set of addresses on our Corporate WAN.
There are two NAT rules - a single 1-1 Static NAT, and an overload NAT for everything else, which uses the Loopback address.
The 1-1 Static NAT is used to NAT our VPN ASA, which is used to establish a Site-Site VPN to one of our counterparts on the Corporate WAN.
This works fine most of the time, however once or twice a day, the NAT just stops working, our Site-site VPN drops, and traffic is being seen on our counterpart's firewall with source address un-NATed (They see 188.8.131.52, when they should see 184.108.40.206).
When we go onto the 6524 and do a show ip nat translations we get the following (220.127.116.11 is our VPN ASA - 18.104.22.168 is just user traffic):
ZR-BDG1-6524#sh ip nat translations
Pro Inside global Inside local Outside local Outside global
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