topic RE: x670V-48x multicast L3 hardware table full in ExtremeSwitching (Other)

x670V-48x multicast L3 hardware table full

Erwin_van_Hoof — Mon, 13 Nov 2017 16:41:00 GMT

Hello,

At a customer we are using 3 stacks of 3 x670v-48 switches.
These are configured native stacking.
The multicast used is PIM Sparse mode.

In the log file I keep seeing the following message:
Slot-2: IPv4 multicast entry not added. Hardware L3 Table full.
When checking the L3 hash table using the following command:
show iproute reserved-entries statistics
I see a total of 357 entries, when the Theoretical maximum is at 4096.
The firmware we use on the switches is 15.4.1.3

Does this entry in the logs indicate a problem with the ipv4 multicast configuration?
If so, what impact does this have on the streams?

RE: x670V-48x multicast L3 hardware table full

Ron_Huygens — Mon, 13 Nov 2017 19:10:00 GMT

Hello Erwin,

Can you take a look at the following article and see if this will help in your situation:
https://gtacknowledge.extremenetworks.com/articles/How_To/Multicast-Entry-not-Added-Hardware-Table-F...

RE: x670V-48x multicast L3 hardware table full

Bin — Tue, 14 Nov 2017 02:01:00 GMT

Heelo Erwin,

Kindly add another article for this topic.

How to prevent "IPv4 multicast entry not added. Hardware L3 table full." log messages
https://gtacknowledge.extremenetworks.com/articles/How_To/How-to-prevent-IPv4-multicast-entry-not-ad...

Best regards,
Bin

RE: x670V-48x multicast L3 hardware table full

Erwin_van_Hoof — Tue, 14 Nov 2017 15:53:00 GMT

Hello,

Thanks for the information.
In the first article you provide instructions to configure an IGMP snooping filter per VLAN. The example given in the article is that a certain Hardware Limitation of a table has been reached, but that is not the case in our environment.

In fact, the maximum multicast adresses is around 4000 on a x670v-48 switch. Is this still a step you recommend to follow?

To me, the information shown when using the command
show iproute reserved-entries statistics displays expected data (around 370 multicast adresses).

Is it possible that this has something to do with the firmware we use?
Firmware version 15.4.1.3 Best regards,
Erwin

RE: x670V-48x multicast L3 hardware table full

Stephane_Grosj1 — Tue, 14 Nov 2017 15:53:00 GMT

Can you give the output of the "show iproute reserved-entries statistics" CLI command?

RE: x670V-48x multicast L3 hardware table full

M_Nees — Tue, 14 Nov 2017 16:07:00 GMT

Hi Erwin,

i recommend you to bring this switch to a recent firmware to exclude all the old bugs ...

Here the vendor recommendation matrix:
http://www.extremenetworks.com/extreme-hardwaresoftware-compatibility-recommendation-matrices/softwa...

Regards,
Matthias