How to setup a static multicast ARP entry with Cisco SF300-08?

[Stanislav Elenskiy]

We're running a cluster in multicast mode as a  loadbalancer.

We have Cisco SF300-08 and when we adding a static ARP entry results in an error message telling the user that the hardware address needs to be a valid  unicast MAC address.

So how to setup a static multicast in Cisco SF300 or maybe someone know other solution to setup multicastes mode in Cisco SF300.

[Tom Watts]

Hi Stanislav, correct you cannot set up a multicast arp entry. You would need to configure the switch under the multicast section for mac or ip group from there you can manually add entries for the groups or use features such as igmp snooping.

-Tom
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[Stanislav Elenskiy]

Hi, Tom!

We have two watchguard xtm505(cluster active-active) in our network. Watchguard interfaces have one ip and one mac adresses. IP 192.168.111.1(Unicast) and MAC 01:00:5e:02:02:03(multicast).  Cisco SF300 is router to outside networks(to internet). Cisco IP adresss is 192.168.111.254. There are another some hosts in this network.

Ping from hosts to 192.168.111.254 works well. Ping from hosts to 192.168.111.1 works well too.  But there is no ping from watchguard cluster(192.168.111.1) to Cisco(192.168.111.254). And there is no routing to internet

This is well-known situation. We need to do following(example for cisco 3750):

1.    Start the Cisco 3750 command line interface.

2.    Add a static ARP entry for the multicast MAC address of the FireCluster interface.

Type this command:

arp arpa

For this example, type:

arp 192.168.111.1 01:00:5e:02:02:03 arpa

3.    Add an entry to the MAC address table.

Type this command:

mac-address-table static vlan interface <#>

For this example, type:

mac-address-table static 01:00:5e:02:02:03 vlan 1 interface gi1/0/11

But we can't add arp entry on Cisco SF300. CLI tells us "MAC address illegal"!

We tried enable igmp snooping, but is not helps.

Could you tell more detailed about MAC groups?

[Tom Watts]

Hi Stanislav, I do not think the SX300 will work in this capacity.

-Tom
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