topic Re: ASA 5510 ISP Failover in Network Security https://community.cisco.com/t5/network-security/asa-5510-isp-failover/m-p/1728720#M561439 <HTML><HEAD></HEAD><BODY><P>Why don't you hand 1 DNS from ISP1 and 1 DNS from ISP2 as dns servers along with the dhcp config?</P><P></P><P>4.2.2.2 - is one you can use. Some ISPs do not allow anything but thier own IPs for DNS so, you may have to double check.</P><P></P><P>-KS</P></BODY></HTML> Wed, 01 Jun 2011 19:46:53 GMT Kureli Sankar 2011-06-01T19:46:53Z ASA 5510 ISP Failover https://community.cisco.com/t5/network-security/asa-5510-isp-failover/m-p/1728719#M561438 <P>Dear Gurus!!!!!</P><P></P><P></P><P>Configured ASA 5510 ISP failover and working fine.</P><P></P><P>My ASA as configured as DHCP server also. So its serves IP addressing details including mask,default-gateway, DNS server IPs.</P><P></P><P>Here my issue is whenever my ISP failover occurs my ASA sends previous ISP DNS server IPs to my inside clients.</P><P></P><P>Here i like to configure my ASA to serve IP addresses dynamically.</P><P></P><P>Or is there any global DNS IP addresses which will work for all ISPs?????</P><P></P><P>Help me to configure the same.</P><P></P><P>Regards,</P><P>MJR </P> Mon, 11 Mar 2019 20:41:08 GMT https://community.cisco.com/t5/network-security/asa-5510-isp-failover/m-p/1728719#M561438 Janardhan Meesala 2019-03-11T20:41:08Z Re: ASA 5510 ISP Failover https://community.cisco.com/t5/network-security/asa-5510-isp-failover/m-p/1728720#M561439 <HTML><HEAD></HEAD><BODY><P>Why don't you hand 1 DNS from ISP1 and 1 DNS from ISP2 as dns servers along with the dhcp config?</P><P></P><P>4.2.2.2 - is one you can use. Some ISPs do not allow anything but thier own IPs for DNS so, you may have to double check.</P><P></P><P>-KS</P></BODY></HTML> Wed, 01 Jun 2011 19:46:53 GMT https://community.cisco.com/t5/network-security/asa-5510-isp-failover/m-p/1728720#M561439 Kureli Sankar 2011-06-01T19:46:53Z