Unable to add L2 Multicaset Address

edmond.chiu · ‎07-03-2007

We gets the following informational message while trying to add the a L2 Multicast Mac address onto Cat 3750G with IOS 12.1(19)EA1d.

Details as below:

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HQIRDMZ2(config)#mac-address-table ?

aging-time Set MAC address table entry maximum age

notification Enable/Disable MAC Notification on the switch

static static keyword

HQIRDMZ2(config)#mac-address-table static ?

H.H.H 48 bit mac address

HQIRDMZ2(config)#mac-address-table static 0100.5e7a.1a01 ?

vlan VLAN keyword

HQIRDMZ2(config)#mac-address-table static 0100.5e7a.1a01 vlan ?

<1-4094> VLAN id of mac address table

HQIRDMZ2(config)#mac-address-table static 0100.5e7a.1a01 vlan 301 ?

drop drop frames

interface interface

HQIRDMZ2(config)#mac-address-table static 0100.5e7a.1a01 vlan 301 interface

GigabitEthernet GigabitEthernet IEEE 802.3z

Port-channel Ethernet Channel of interfaces

<cr>

HQIRDMZ2(config)#mac-address-table static 0100.5e7a.1a01 vlan 301 interface gigabitEthernet 1/0/23

Supports only l3-ipmulticast addresses.

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I have tried to add thsi on a Cat 3750 with version 122-20.SE3. I do not see the problem.

Please advise how to achieve. I have attached sh ver and sh run ouptut here.

Thanks

wong34539 · ‎07-09-2007

network interface cards (NICs) on a LAN segment could receive only packets destined for their burned-in MAC address or the broadcast MAC address. In IP multicast, several hosts need to be able to receive a single data stream with a common destination MAC address. Some means had to be devised so that multiple hosts could receive the same packet and still be able to differentiate between several multicast groups.

One method to accomplish this is to map IP multicast Class D addresses directly to a MAC address. Today, using this method, NICs can receive packets destined to many different MAC addresses?their own unicast, broadcast, and a range of multicast addresses. The IEEE LAN specifications made provisions for the transmission of broadcast and multicast packets. In the 802.3 standard, bit 0 of the first octet is used to indicate a broadcast or multicast frame.