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• Configuration Limits

Configuration Limits

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The following table lists the Cisco verified limits for topologies that include Layer 2 and Layer 3 feature configurations.

Note	If your scale requirements exceed either the Verified Topology or the Verified Maximum limit, please contact your Cisco representative. Based on your requirements, it may be possible to validate support for your requirement, as long as the scale capability of the hardware is not exceeded.

Table 1 Cisco NX-OS Release 5.0(3)U2(2) Layer 2 and Layer 3 Topology Configuration Limits

Feature	Verified Topology1			Verified Maximum2
Active VLANs per switch	4,0003			4,0004
MTU	9,216			9,216
STP logical interfaces	9,000			9,000
MST instances	64			64
MAC table size	32,000			128,000
EtherChannels	8			64 (with the maximum of 16 port members per EtherChannel)
Number of switch port EtherChannels	16			16
SPAN sessions	2 active sessions			4 active sessions5
Layer 3 physical interfaces	64			64
Layer 3 SVI, subinterfaces, EtherChannels	1,024			1,024
VRF	200			1,024
IPv4 hosts	8,192			16,000 (Nexus 3048 and Nexus 3064-E) 8,000 (Nexus 3064PQ)
IPv4 routes (LPM)	8,1926			16,0007
Multicast routes	2,048			8,000 (Nexus 3048 and Nexus 3064-E) 4,000 (Nexus 3064PQ)
IGMP Snooping groups	3,000			8,000
ECMP	8-way			64-way
TCAM entries for ACL	2,000 ingress, 1,000 egress			2,000 ingress, 1000 egress
HSRP	255			500
VRRP	2558			2559
Configurable QoS groups	8			8

¹ Verified Topology-- Indicates the verified scaling capabilities with all listed features enabled at the same time. The numbers listed here exceed those used by most customers in their topologies. The scale numbers listed here are not the maximum verified values if each feature is viewed in isolation.

² Indicates the maximum scale capability tested for the corresponding feature individually. this number is the absolute maximum currently supported by Cisco NX-OS Release 5.0(3)U(2) software for the corresponding feature. If the hardware is capable of a higher scale, future software releases may increase this verified maximum limit.

³ 507 VLANs in PVRST mode. 512 VLANs in RPVST mode where 507 are user-defined VLANs, and 4,000 VLANs in MST mode.

⁴ 507 VLANs in PVRST mode. 512 VLANs in RPVST mode where 507 are user-defined VLANs, and 4,000 VLANs in MST mode.

⁵ 4 active SPAN sessions with the SPAN source in a single direction (RX only or TX only in each SPAN session. 2 active SPAN sessions with the SPAN source in both RX and TX directions.

⁶ 8,192 when URPF is enabled globally.

⁷ Increase to 16,000 when URPF is disabled globally. Use the system urpf disable command to disable URPF.

⁸ A combination of HSRP and VRRP groups, where the total is 255.

⁹ A combination of HSRP and VRRP groups, where the total is 255.

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