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HP A5100-24G SI Switch - MAC address learning issue

Downer
Occasional Visitor

HP A5100-24G SI Switch - MAC address learning issue

Hello all,

we have some issues with MAC address learning. The switch sometimes forgets some learned MAC addresses. The upstream trafic to the router is forwarded correctly, but the downstream trafic is broadcasted in appropriate VLAN. I have upgraded the software to the latest version, but with no results.

 

We solved it temporary with static entry to the mac-table, but after "mac-address static 00e0-7de5-024f interface GigabitEthernet 1/0/27 vlan 1010" I get this message "MAC table is almost full". See bellow.

 

[Kovoterm]mac-address static 00e0-7de5-024f interface GigabitEthernet 1/0/27 vlan 1010
[Kovoterm]
#May 15 09:26:27:616 2000 Kovoterm ADBM/5/MAC TABLE ALMOST FULL:- 1 -
 MAC table is almost full
 
[Kovoterm]display mac-address 00e0-7de5-024f                                    MAC ADDR        VLAN ID   STATE          PORT INDEX               AGING TIME(s)
00e0-7de5-024f  1010      Config static  GigabitEthernet1/0/27    NOAGED
[Kovoterm]display mac-address statistics
MAC TYPE            LEARNED   USER-DEFINED   SYSTEM-DEFINED IN-USE    AVAILABLE
Dynamic   Unicast   1049      0              0              1049
Static    Unicast   0         1              1              1         1024
Total     Unicast                                           1050      8192

 

Have somebody any idea, how to solve this problem? 

 

Thanks for your suggestions,

 

Michal

3 REPLIES
manuel.bitzi
Trusted Contributor

Re: HP A5100-24G SI Switch - MAC address learning issue

Hi downer

 

If a mac-table is full the switch floods packets of unknown mac-addresses into the VLAN. That's a normal behaviour. But it don't looks like your table is full. There should be ~7k free entries.

 

I think it's a bug. Please check with the HP support.

 

 

br

Manuel

H3CSE, MASE Network Infrastructure [2011], Switzerland
Downer
Occasional Visitor

Re: HP A5100-24G SI Switch - MAC address learning issue

Hi Manuel, 

 

thanks for the answer.

 

I tried to contact HP tech support, but this product is out of warranty for tech support since 2009. Do you have any suggestions how to solve it? Software downgrade maybe?

 

BR

 

Michael

manuel.bitzi
Trusted Contributor

Re: HP A5100-24G SI Switch - MAC address learning issue

Sorry, I can't help. The A5100 SI is an old ex-H3C-labeled Switch which was cut out the HP portofolio during the merger.

 

Downgrading may helps, but I cant raise your hopes.

 

 

br

Manuel

H3CSE, MASE Network Infrastructure [2011], Switzerland