https://community.cisco.com/t5/network-security/asa-cluster-with-asa-active-passive-udp-issues-or-design-issue/m-p/2763606#M178841 <P>hi all, We have a setup cabled accordingly as per diagram.</P><P>T2 Firewall is cabled Back to Back to a pair of Active Passive firewall. Both firewall are routed.</P><P>I have no issues pinging and routing from App server to DNS server. However nslookup to the DNS server is intermittent.</P><P>&nbsp;</P><P>Our suspect is that the way ASA cluster firewall is connected to the ActivePassive ASA.</P><P>and the flow or the traffic is being lost somehow on the stub director/owner.</P><P>&nbsp;</P><P>Appreciate any insight.</P> Tue, 12 Mar 2019 06:35:58 GMT J_Vansen_S 2019-03-12T06:35:58Z https://community.cisco.com/t5/network-security/asa-cluster-with-asa-active-passive-udp-issues-or-design-issue/m-p/2763606#M178841 <P>hi all, We have a setup cabled accordingly as per diagram.</P><P>T2 Firewall is cabled Back to Back to a pair of Active Passive firewall. Both firewall are routed.</P><P>I have no issues pinging and routing from App server to DNS server. However nslookup to the DNS server is intermittent.</P><P>&nbsp;</P><P>Our suspect is that the way ASA cluster firewall is connected to the ActivePassive ASA.</P><P>and the flow or the traffic is being lost somehow on the stub director/owner.</P><P>&nbsp;</P><P>Appreciate any insight.</P> Tue, 12 Mar 2019 06:35:58 GMT https://community.cisco.com/t5/network-security/asa-cluster-with-asa-active-passive-udp-issues-or-design-issue/m-p/2763606#M178841 J_Vansen_S 2019-03-12T06:35:58Z