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Ping or Telnet on port 25 not working from Windows NLB servers to F5 Load balance virtual IP
MS windows Server NLB services running Cannot ping or telnet mail Server's Virtual IP configured on F5 LTM neither could telnet on port 25
netstat -ano shows that 10.4.60.182:25 waiting on status Sync_sent (screenshot attached)
Interestingly as soon as i start packet capture on wireshark ping and telnet starts to work
I feel that there is some discrepancy in the IP or the MAC address in the communication happenign between f5 and MS windows server (screen shot attached)
As I said MS windows are running NLB services for web application running, So its NLB VIrtual IP is basically having all the ARP associated to it , screen shot attached
MS server IP 10.4.60.131
MS NLB IP 10.4.60.130
F5 Virtual IP 10.4.60.182
F5 Floating IP 10.4.60.218
Note: MS NLB Can ping and telnet to MS Exchange CAS IP successfully, only failing with F5 however rest of the Servers/ smarthost can commnicate with F5 successfully
netstat -ano shows that 10.4.60.182:25 waiting on status Sync_sent (screenshot attached)
Interestingly as soon as i start packet capture on wireshark ping and telnet starts to work
I feel that there is some discrepancy in the IP or the MAC address in the communication happenign between f5 and MS windows server (screen shot attached)
As I said MS windows are running NLB services for web application running, So its NLB VIrtual IP is basically having all the ARP associated to it , screen shot attached
MS server IP 10.4.60.131
MS NLB IP 10.4.60.130
F5 Virtual IP 10.4.60.182
F5 Floating IP 10.4.60.218
Note: MS NLB Can ping and telnet to MS Exchange CAS IP successfully, only failing with F5 however rest of the Servers/ smarthost can commnicate with F5 successfully
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Exchange
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Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.