Forum Discussion

Lopez_Diaz's avatar
Lopez_Diaz
Level 4
12 years ago

Lost connection to clients

Hello, we have a Netbackup Appliance 5230 with version 2.5.3. The Master Server version is 7.5.0.6. The issue is that the clients that connects by DHCP are not connecting. In the Host Properties the Status is "cannot connect on socket". When I do a ping command the server ping the IP that they had when they were added to the Policies. The commands bpclntcmd -hn and bpclntcmd -ip shows different ip address. The nslookup and host commands show the correct IP of the hosts. I did the bpclntcmd -clear_host_cache but it did not resolve the issue.

 

 

Backing Up
Backup and Recovery
Linux
NetBackup Appliance
Troubleshooting
  • Mark_Solutions's avatar
    Mark_Solutions
    12 years ago

    You usually need to do the -clear_host_cache at least twice to flush it out

    Also check that you do not have hosts entries for any of those servers on the appliance

    I have to be honest that the idea of backing up clients that have DHCP allocated addresses really is not great and i would trongly advise having them all provided with fixed IP addresses or a reserved DHCP IP address

  • Mark_Solutions's avatar
    Mark_Solutions
    Level 6
    12 years ago

    You usually need to do the -clear_host_cache at least twice to flush it out

    Also check that you do not have hosts entries for any of those servers on the appliance

    I have to be honest that the idea of backing up clients that have DHCP allocated addresses really is not great and i would trongly advise having them all provided with fixed IP addresses or a reserved DHCP IP address

  • Marianne's avatar
    Marianne
    Level 6
    12 years ago

    When I do a ping command the server ping the IP that they had when they were added to the Policies. 

    so, ping is still using the old, incorrect IP address? This looks like a problem at OS level. 

    NBU is not involved when doing ping command.
    What is nslookup showing?
     

  • Marianne's avatar
    Marianne
    Level 6
    12 years ago

    Have you seen Mark's post?

    Also check that you do not have hosts entries for any of those servers on the appliance

    I have to be honest that the idea of backing up clients that have DHCP allocated addresses really is not great and i would strongly advise having them all provided with fixed IP addresses or a reserved DHCP IP address

     

  • Shaf's avatar
    Shaf
    Level 6
    12 years ago

    lopez,

    Ping will be disabled if the clients are in dmz behind the firewall,

    as Said by mark, dhcp is not a good idea..

     

    try telnet,

    /usr/openv/netbackup/bin/admincmd/bptestbpcd -client <client name> -debug -verbose