Wired Intelligent Edge

I have searched information about the MAC address table size for the Aruba 8400 and I have found the size of 32K/64K for the 1st software release (Reference: Aruba 8400 Switch Series Technical Product Presentation)

Does anybody know when we are talking of a size of 32K and when of a size of 64K?, what is the difference?

Thanks in advance

Pedro

For network desin and real world implmentations, I would follow the Reference Architecture sizing guidelines to be safe.

https://support.hpe.com/hpsc/doc/public/display?docId=a00056448en_us

Hi Rob,

Thank you for your time.

The document you sent me is a good design guide. I will follow the sizing guidelines as you suggest.

On the other hand, what I wanted to understand is the double value (32K/64K) that is referred in the table of the document I posted (Reference: Aruba 8400 Switch Series Technical Product Presentation, I attached an image).

When table size is 32K and when the table size is 64K?

Regards

Pedro

Can you please e-mail me the entire presentation so I can have the full context.  rob.a.haviland@hpe.com

Have an incredible day.

Rob

Of course Rob.

Already done.

Regards

Pedro

it is no a typo ?

the 8320 have different mode (Routed or Mobile-First) and the spec depend of selected mode (by default Routed)

Hi Alexis,

Thanks for your time, but I do not know if it is a typo or not, I think that answer should be given by the owner of the document.

Talking about 8320, what is the table size for each mode?. Where to find those modes in the manual?

Regards

Pedro

You can look this topic https://community.arubanetworks.com/t5/Wired-Intelligent-Edge-Campus/8320-Switch-Forwarding-Table-Modes/td-p/452988

Hi All,

The 8320 has two 'platfom modes':  mobile-first (mode 3) and routing (mode 4).  These modes makes changes to the table sizes for MAC entries, host entries, and routes.  Host entries (ARP or ND) share the same table resources.  

Using the 'platform forwarding-table-mode' command you can display the maximum capacities for each of these tables:

SWHQ-AGG1A# platform forwarding-table-mode
3 (98304 L2 entries 120000 Host entries 16384 Route entries)
4 (32768 L2 entries 14000 Host entries 131064 Route entries)

For most deployments we recommend using the mobile-first mode.  If your requirements call for supporting a large number of routes and a low number of MAC and host entries mode 4 should be used.

Drilling down into the host table and planning for either a v6 or dual-stack network it is important to understand that a v6 host entry (ND) consumes two entries in the host table while a v4 host entry (ARP) consumes one entry.  Estimating the number of v6 entries for environments that use SLAAC (as well as SLAAC and/or stateful/stateless DHCPv6) is challenging as client devices will have multiple IPv6 addresses and can generate additional addresses.   Assumptions must be made as to the number of addresses each device will use.  We have observed SLAAC enabled devices consuming a minimum of three addresses.

WIth ArubaOS-CX 10.1 on the 8320, we recommend designs use 80% of maximium scale with the assumption that each device will have 3 IPv6 global addresses and/or 1 IPv4 address.  The mobile-first (mode 3) scaling data is below:

IPv4 Networks:  39,200 Client Devices

IPv6 Networks:  16,000 Client Devices

Dual Stack Networks: 13,600 Client Devices

Client Devices are the total number of directly connected, wireless clients, user-based tunnel clients, and port-based tunnel clients.