There is a maximum hosts quantity for Cisco SF300?

[calavalle]

Hi everybody,

i´m using a Cisco SF300 (SRW224G4P) in my network and i´m using Vlan´s.

I´m getting a lot of packet´s loss in the network and the users are experiencing the lack of performance.

There are in total seven switch´s in the network, 6 Cisco SF200 as "access" switch´s and 1 Cisco SF300 as the "Core" switch.

There is almost 170 devices connected to the network, mainly IP cameras, other devices are some DVR´s and NVR´s, one server a some PC´s.

Thing is i´m having packet´s loss, and i found this alarm in the SF300:

2147480831 2012-Jul-06 13:14:45 Warning %IPFFT-W-SFFTREDYELLOW: IP SFFT Table Overflow, aggregated (1)

2147480831 2012-Jul-06 13:14:45 Warning %IPFFT-W-SFFTREDYELLOW: IP SFFT Table Overflow

Some people are saying this switch (SF300) support´s only 100 hosts and that´s why i´m getting this alarm and loosing packets.

But i cant find the host´s limit in the switch specification in any Cisco document.

What do you think on this?

There is a limitation of 100 hosts for this switch?

Thanks in advance!

Carlos

[Tom Watts · Accepted solution]

Hi Calavalle, the layer 3 module can only hardware switch 100 before it starts software switching. The switch can support up to 510 IP addresses but anything over 100 will have expected performance degradation.

-Tom
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[calavalle]

Tom, thanks a lot for your fast and accurate answer.

I will "shoot" you a new question to see if you can help me a little bit more:

According to your answer, the performance degradation in the network is important so i want to change the "core" switch for a different equipment more according to the requirements. I have two questions about this:

1- Do you think i have to go to a Catalyst line switch, for example a 2960 like the WS-C2960-24PC-L?
Or is ok/enough to go to an SF500 like the SF500-24P-K9-AR?

2- Do you think it is OK to use a new "core" switch? Or it is maybe possible and technically better to think in use a router for all the VLan´s routing/switching?

Thanks in advance again,

Carlos

[Tom Watts · Accepted solution]

The SX500 will have the same behavior as the SX300. A 2960 would be better suited for 100-200 users.

-Tom
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