ClusterXL works by mapping an unicast IP address (Cluster IP address)
to a multicast IP address.
As it's not exactly RFC like, Cisco switch and router seem to have
problem with this.
Check in the ARP table of th e next hop router if you've got an entry
associating the IP address of the cluster with the MAC multicast
address. If not, add one static entry.
Check in the CAM table of the switch if you could see the virtual
multicast MAC addres. If not, add it statically on the interfaces on
wich you've plugged the gateway.
This should help solving the problem.
Additionnaly, on complex LAN architecture, you could put all this in a
seperate VLAN. We have tryed also to disable IGMP Snooping, on the
switch. The purpose of this test was that the switch handle the
multicast traffic as broadcast. We got 2 Cico in HSRP mode, and what
we see is that it don't work too. The packets goes from one cisco to
the other (real IP, not HSRP IP).
Sylvain
-----Original Message-----
From: Leonardo Boulton [mailto:[email protected]]
Sent: mercredi 19 février 2003 01:54
To: [email protected]
Subject: [FW-1] Cluster XL FP3 - Mulicast or Broadcast?
Hi Guru lads,
I have a problem with cluster XL and I'm sure you are going to
help me on this.
I have a cluster XL Load Sharing Configuration (just upgraded from
FP2 to FP3) on two Solaris 8 boxes. Previously, they were
synchronizing through the administration network that is connected
to a Cisco 5500 switch. After the upgrade, I saw that both modules
couldn't synchronize anymore, so I tested using a Hub instead of
the 5500 switch. It worked!.
I suspected that, because I read somewhere (or I dreamed about it)
that state synchronization used to be through Boradcasts, but now
it is through Multicasts. Is that right?. What do I have to do for
it to work with the switch?.
Thanks for your help and comments,
cheers,
LB
