Configuration for Microsoft NLB Network Loadbalancer

devnull · Post by **devnull** » 26 Oct 2010 05:25

I don't know whether this was already handled here because NLB is a too short search term.

I am looking for Information on how to connect Microsoft NLBs to a 6850 stack. A customer has a 6850 stack which has a 4 port lag to a bladeserver running Microsoft NLB in Multicast mode.

i know a paper for cisco switches, is there something similar for Alcatel?

Post by **silvio** » 27 Oct 2010 09:00

I haven't used this until now but there are some techtips in BPW for this: 5040 and 4847.
regards Silvio

cedric1 · Post by **cedric1** » 29 Oct 2010 06:06

could you upload cisco techtips ?

devnull · Post by **devnull** » 29 Oct 2010 06:07

Just google:
For Cisco i always used: http://www.cisco.com/en/US/products/hw/ ... 7203.shtml

cedric1 · Post by **cedric1** » 29 Oct 2010 06:16

ok you can use the same on 6850 with multicast mac and join port member of this multicast group.

be sure to use last code on your product

Using Static Multicast MAC Addresses
Using static multicast MAC addresses allows you to send traffic intended for a single destination multicast
MAC address to selected switch ports within a given VLAN. To specify which ports will receive the
multicast traffic, a static multicast address is assigned to each selected port for a given VLAN. The ports
associated with the multicast address are then identified as egress ports. When traffic received on ports
within the same VLAN is destined for the multicast address, the traffic is forwarded only on the egress
ports that are associated with the multicast address.
When defining a static multicast MAC address for a particular port and VLAN, consider the following:
• A MAC address is considered a multicast MAC address if the least significant bit of the most significant
octet of the address is enabled. For example, MAC addresses with a prefix of 01, 03, 05, 13, etc.,
are multicast MAC addresses.
• If a multicast prefix value is not present, then the address is treated as a regular MAC address and not
allowed when using the mac-address-table static-multicast command.
• Multicast addresses within the following ranges are not supported:
01:00:5E:00:00:00 to 01:00:5E:7F:FF:FF
01:80:C2:XX.XX.XX
33:33:XX:XX:XX:XX
• Configuring static multicast addresses is only supported on non-mobile ports.
• In addition to configuring the same static multicast address for multiple ports within a given VLAN, it
is also possible to use the same multicast address across multiple VLANs.
• The specified port or link aggregate ID must already belong to the specified VLAN. Use the
vlan port default command to assign a port or link aggregate to a VLAN before you configure the
static multicast address.
Configuring Static Multicast MAC Addresses
The mac-address-table static-multicast command is used to define a destination multicast MAC address
and assign the address to one or more egress ports within a specified VLAN. For example, the following
command assigns the multicast address 01:25:9a:5c:2f:10 to port 1/24 in VLAN 20:
-> mac-address-table static-multicast 01:25:9a:5c:2f:10 1/24 20
To assign a multicast address to more than one port, enter a range of ports and/or multiple port entries on
the same command line separated by a space. For example, the following command assigns the multicast
address 01:25:9a:5c:2f:10 to port 1/24 and ports 2/1 through 2/6 in VLAN 20:
-> mac-address-table static-multicast 01:25:9a:5c:2f:10 1/24 2/1-6 20
Use the no form of the mac-address-table static-multicast command to delete static multicast MAC
address entries. For example, the following command deletes a static multicast address that is assigned to
port 2 on slot 3 for VLAN 855:
-> no mac-address-table static-multicast 01:00:02:CE:10:37 3/2 855

cedric1 · Post by **cedric1** » 29 Oct 2010 06:18

and read that too

https://service.esd.alcatel-lucent.com/ ... umber=4847

Cedric

devnull · Post by **devnull** » 29 Oct 2010 07:24

i read the file, had a acse here yesterday whose experience with alcatel and nlb are .. .. .. medicore at best.

His statement: "dioesn't matter what alcatel writes it never worked .. " and "all my customers stopped trying this with alcatel.."

i am trying by myself, we will see. i'll keep you updated.

Post by **silvio** » 29 Oct 2010 07:54

Hi devnull,
important is the info from TechTip 5040:
".... OS6850-24X is the only product in the OS6850 family which supports Microsoft Network Load Balancing (NLB) in a routed environment. ..... But it's not supported on OS6850-48 ports model."
most users try to use it with other modells.
regards
Silvio

cedric1 · Post by **cedric1** » 29 Oct 2010 08:07

so Silvio case 1 in techtips should work with other models than 24X

devnull · Post by **devnull** » 02 Nov 2010 10:20

According to Alcatel Support Microsoft NLB is only supported on 6850-24 (does not matter whether 6850-24P, 6850-24X ...)

But only in standalone mode, that means no stacking allowed.
On a customers site for redundancy and configuration we only have stacked 6850-U24X, therefore this customer will not be able to use their NLB:-/

At least i can blame Alcatel Support.