Mac Address Limit

[lcarbajalparedes]

Hello,

I would like to know the limit of mac address for this switch 3750X,

I configured the sdm value to this

The current template is "desktop routing" template.
The selected template optimizes the resources in
the switch to support this level of features for
8 routed interfaces and 1024 VLANs.

  number of unicast mac addresses:                  3K

I would like to know if this will limit the quantity of mac address that can handle the Switch.

Regards,

[Rick Morris]

Is there a reason why you want to know the number of MAC addresses?  For a 3750 I do not think you will ever reach the threshold. 

Here is the info taken from the Cisco DataSheet

http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps6406/data_sheet_c78-584733.html

Cisco Catalyst 3750-X and 3560-X Series Specifications

Switch Performance

Table 9 shows Cisco Catalyst 3750-X and 3560-X Series Switches performance specifications.

Table 9. Cisco Catalyst 3750-X and 3560-X Performance Specifications

Performance Numbers for All Switch Models
Switching Fabric	160 Gbps
DRAM	256 MB (512 MB for 3750X-12S and 3750X-24S)
Flash	64 MB (128 MB for 3750X-12S and 3750X-24S)
Total VLANs	1005
VLAN IDs	4K
Total Switched Virtual Interfaces (SVIs)	1K
Jumbo Frame	9216 Byte
Total Routed Ports per 3750-X Stack	468
Forwarding Rate of the Switch Models (with Two 10GbE Uplinks)
	Forwarding Rate
3750X-24T 3750X-24P	65.5 mpps
3750X-48T 3750X-48P 3750X-48PF	101.2 mpps
3750X-12S	35.7 mpps
3750X-24S	65.5 mpps
3560X-24T 3560X-24P	65.5 mpps
3560X-48T 3560X-48P 3560X-48PF	101.2 mpps

Scalability Numbers

MAC, routing, security, and QoS scalability numbers depend on the type template used in the switch. Routing template is not supported in the LAN Base feature set. Table 10 shows Cisco Catalyst 3750-X and 3560-X Series Switch scalability numbers.

Table 10. Cisco Catalyst 3750-X and 3560-X Series Switch Scalability Numbers

	Access	Default	Routing	VLAN
Unicast MAC addresses	4K	6K	3K	12K
IGMP groups and multicast routes	1K	1K	1K	1K
Unicast routes	6K	8K	11K	0
Directly connected hosts	4K	6K	3K	0
Indirect routes	2K	2K	8K	0
Policy-based routing ACEs	0.5K	0	0.5K	0
QoS classification ACEs	0.5K	0.5K	0.5K	0.5K
Security ACEs	2K	1K	1K	1K
VLANs	1K	1K	1K	1K

[lcarbajalparedes]

Hello,

We are installing new servers and pc, mobile equipments , i just wanted to confirm what will be the mac address limit for the template we are using now.

Regards,

[Rick Morris]

Based on these specs I am pretty sure you will not have any issues.

[Peter Paluch]

Hello Luis Ernesto,

Yes, the data displayed in the show sdm prefer command output describe the current limit on the number of MAC addresses. Different SDM templates allow for different limits in diverse features, so according to the intended usage of your switch, you should choose the appropriate SDM template that best fits your needs.

In addtion, you may want to check the output of the show mac address-table count command - at the bottom of the output, the switch indicates the current limit of MAC address count.

Best regards,

Peter