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Sandeep_Gupta_1's avatar
Sandeep_Gupta_1
Icon for Nimbostratus rankNimbostratus
Aug 21, 2013

Virtual Server creation

Hello,   I am new to F5 and using the evaluation version of F5 (Big IP LTM Virtual Edition). I am facing problem while creating the virtual server for tomcat application.   F5 Big-IP LTM VE is...
cloud
deployment
vmware
nitass's avatar
nitass
Icon for Employee rankEmployee
Aug 24, 2013

Is there any way to change the netmask ? In general I am using netmask 255.255.254.0

you can use modify ltm virtual command. please make sure translate-address is enabled (i.e. it will translate destination ip to pool member ip). also, you may have to enable arp on network virtual address.

e.g.

root@ve10(Active)(tmos) list ltm virtual bar
ltm virtual bar {
    destination 172.28.19.252:http
    ip-protocol tcp
    mask 255.255.255.255
    pool foo
    profiles {
        http { }
        tcp { }
    }
    snat automap
}

root@ve10(Active)(tmos) modify ltm virtual bar destination 172.28.18.0:80 mask 255.255.254.0 translate-address enabled

root@ve10(Active)(tmos) list ltm virtual bar
ltm virtual bar {
    destination 172.28.18.0:http
    ip-protocol tcp
    mask 255.255.254.0
    pool foo
    profiles {
        http { }
        tcp { }
    }
    snat automap
}

root@ve10(Active)(tmos) list ltm virtual-address 172.28.18.0
ltm virtual-address 172.28.18.0 {
    arp disabled
    mask 255.255.254.0
}

root@ve10(Active)(tmos) modify ltm virtual-address 172.28.18.0 arp enabled

root@ve10(Active)(tmos) list ltm virtual-address 172.28.18.0
ltm virtual-address 172.28.18.0 {
    mask 255.255.254.0
}