ACE Source NAT

Unanswered Question
Dec 23rd, 2008

Hi Team,

I have ACE implemented in the routed mode.We have 2 servers and 2 users in the same vlan.

2 of the servers are getting loadbalanced.Now the other 2(users) which are not getting load balanced want to access the severs using in VIP for the load balanced servers.

Now the issue is all the servers are having the same subnet, How should i proceed in this can i have the sample configuration regarding this.

I have this problem too.
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aslamta123 Wed, 12/24/2008 - 00:58


For source nating you can try as follows ..

-- define a class --

class-map match-all NAT

2 match source-address " subnet "

-- in policy map multimatch --

class NAT

nat dynamic 9 vlan "server vlan "

--create a nat pool in server interface --

nat-pool 9 "IP pool" netmask pat



rajesh.perumalla Wed, 12/24/2008 - 01:49


configuration example that may be helpful for u.

class-map match-all SNAT

2 match source-address

policy-map multi-match L4


loadbalance vip inservice

loadbalance policy WEB-PM

loadbalance vip icmp-reply

class SNAT

nat dynamic 100 vlan 31

interface vlan 31(Server Vlan)

ip address


peer ip address

mac-sticky enable

access-group input 1

nat-pool 100 netmask pat

service-policy input L4

no shutdown

ACE1/SP1# sh xlate

TCP PAT from vlan31: to vlan31:




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