carp questions

[Mark Jayson Alvarez]

Good day freebsd-net!

 I have tried everything to make it work, yet I failed misserably
 
 Here are my findings:
 
 1. First arping only works if it detects more than 1 carp-enabled machine.
 2. I can still see that both of the two carp-enabled machine as BACKUP (even with the other having lower advskew).
 
 3. I still can't ping the virtual ip address.. perhaps because none of them is in MASTER state.. specifying 'state MASTER' in ifconfig results in command error. If this is the case, then how would I ever be able to use that virtual ip for the clients gateway? Specifying a lower advskew doesn't make it MASTER either.
 4. In OpenBSD's carp documentation, one can specify the state, and also the carp device to use that will belong to the group, however not in FreeBSD, are those still necessary in FreeBSD?
 
 Here are the ifconfig output on both machine:
 
 Machine intended to be the MASTER:
 
 xl0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
         options=9<RXCSUM,VLAN_MTU>
         inet6 fe80::201:2ff:fe88:d8c%xl0 prefixlen 64 scopeid 0x1
         inet 10.10.8.144 netmask 0xffffff00 broadcast 10.10.8.255
         ether 00:01:02:88:0d:8c
         media: Ethernet autoselect (100baseTX <full-duplex>)
         status: active
 plip0: flags=108810<POINTOPOINT,SIMPLEX,MULTICAST,NEEDSGIANT> mtu 1500
 lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
         inet6 ::1 prefixlen 128
         inet6 fe80::1%lo0 prefixlen 64 scopeid 0x3
         inet 127.0.0.1 netmask 0xff000000
 carp0: flags=41<UP,RUNNING> mtu 1500
         inet 10.10.8.146 netmask 0xffffff00
         carp: BACKUP vhid 1 advbase 1 advskew 0
 
 
 
 Machine intended to be the BACKUP:
 
 xl0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
         options=9<RXCSUM,VLAN_MTU>
         inet6 fe80::201:2ff:fe90:1957%xl0 prefixlen 64 scopeid 0x1
         inet 10.10.8.145 netmask 0xffffff00 broadcast 10.10.8.255
         ether 00:01:02:90:19:57
         media: Ethernet autoselect (100baseTX <full-duplex>)
         status: active
 plip0: flags=108810<POINTOPOINT,SIMPLEX,MULTICAST,NEEDSGIANT> mtu 1500
 lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
         inet6 ::1 prefixlen 128
         inet6 fe80::1%lo0 prefixlen 64 scopeid 0x3
         inet 127.0.0.1 netmask 0xff000000
 carp0: flags=41<UP,RUNNING> mtu 1500
         inet 10.10.8.146 netmask 0xffffff00
         carp: BACKUP vhid 1 advbase 1 advskew 100
 
 
 
 The sysctl output on both machines:
 
 net.inet.carp.allow: 1
 net.inet.carp.preempt: 1
 net.inet.carp.log: 1
 net.inet.carp.arpbalance: 0
 net.inet.carp.suppress_preempt: 0
 
 
 
 Anymore idea?
 Thanks
 
 
 
 
 
 
 
 
 
 
 
 
Atanas Yankov <xds at LanGame.Net> wrote: It's must go into ports and install it ;))

cd /usr/ports/net/arping/
make install clean
then man arping

and then read man carp carefully

there is 2 examples one that work for fail-over and second that make 
fail-over and load-balacing

i think you should try this one

<
          ifconfig carp0 create
          ifconfig carp0 vhid 1 pass mekmitasdigoat 192.168.1.10/24
          ifconfig carp1 create
          ifconfig carp1 vhid 2 advskew 100 pass mekmitasdigoat 
192.168.1.10/24

    The configuration for host B is identical, except the advskew is on 
vir-
    tual host 1 rather than virtual host 2.

          ifconfig carp0 create
          ifconfig carp0 vhid 1 advskew 100 pass mekmitasdigoat 
192.168.1.10/24
          ifconfig carp1 create
          ifconfig carp1 vhid 2 pass mekmitasdigoat 192.168.1.10/24

     Finally, the ARP balancing feature must be enabled on both hosts:

          sysctl net.inet.carp.arpbalance=1
 >
then arping -i em0  192.168.1.10


br,
CCNP Atanas Yankov
Network Administrator
AngelSoft Ltd.

Mark Jayson Alvarez wrote:

>
>
> */Atanas Yankov /* wrote:
>
>     The better solutuon to test how carp worked is a arping :))) not
>     ssh or
>     other and you may be
>     need to set a /32 mask for a virtual ip address , if you remind how
>     works ip alliasing in freebsd.
>
> No luck, no manual entry for arping. the /32 mask won't work either. 
> both of them shows that they are the BACKUP machine.. Ucarp is a lot 
> easier... however I really like to make this work in the kernel 
> level.. anymore idea?
>
> ------------------------------------------------------------------------
> Yahoo! FareChase - Search multiple travel sites in one click. 
>  





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