Verified Scalability Limits

This document describes the Cisco NX-OS configuration limits for the Cisco Nexus 3548.

Introduction

This document lists the Cisco verified limits for topologies that include Layer 2 and Layer 3 feature configurations.

In the following tables, the Verified Topology column lists 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.

The Verified Maximum column lists the maximum scale capability tested for the corresponding feature individually. This number is the absolute maximum currently supported by the Cisco NX-OS Release software for the corresponding feature. If the hardware is capable of a higher scale, future software releases may increase this verified maximum limit.


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.

Verified Scalability Limits

The tables in this section list the verified scalability limits for Cisco NX-OS Release 9.3(1).

Table 1. Layer 2 and Layer 3 Topology Configuration Limits

Feature

Verified Topology

Verified Maximum

Active VLANs per switch

507 (vPC - normal mode)

507 (with RSTP)

4000 (with MSTP)

BFD neighbors

0

32

MTU

9,216

9,216

STP logical interfaces

2,500

9,000

MST instances

63

64

MAC table size

8,192

40,000 (vPC , Normal mode)

65,532 (non-vPC , Normal mode)

8,192 (non-vPC , Warp mode)

Port Channels

40 vPC port-channels

8 non-vPC port-channels

40 vPC port-channels

24 non-vPC port-channels

Number of member ports per Port Channel

16

24

Number of system logging destination ports

0

8

SPAN sessions

4 active sessions

1

4 active bi-directional sessions2

1 destination ports per session

Layer 3 physical interfaces

10

48

Layer 3 SVI, subinterfaces, EtherChannels

256

1,024

VRF

10

200

IPv4 hosts

4,096

65,535 3

IPv4 routes (LPM)

8192 (vPC , Normal mode)

4096 (non-vPC , Warp mode)

24,576 (vPC , Normal mode )

24,576 (non-vPC , Normal mode )

4096 (non-vPC , Warp mode)

Multicast routes

4000 (vPC , Normal mode)

7,990 (non-vPC , Warp mode)

4000 (vPC , Normal mode)

8,192 (non-vPC , Normal mode)

IGMP Snooping groups

3,000

8,192

ECMP4

2-way

32-way

TCAM entries for ACL

384 ingress (Normal mode) 128 ingress (Warp mode)

3,000 ingress, 1,000 egress (Normal mode)

HSRP

256

500

VRRP

2505

2566

Configurable QoS groups

4

4

BGP neighbors

85

100

OSPF neighbors

150 (in a single area, area 0)

150 (in a single area, area 0)

PIM neighbors

250

250

NAT translations

1023

1 Allows same SPAN source in a single direction in 2 SPAN sessions with difference destinations.
2 4 active SPAN sessions regardless of the direction of the SPAN session.
3 The host IP address pattern can lead to a hash collision in the host table and therefore the number of host routes programmed will be lesser than 65,535. To avoid a collision, use a different IP address range.
4 Only supported in Normal Traffic Forwarding mode.
5 A combination of HSRP and VRRP groups, where the total is 250.
6 A combination of HSRP and VRRP groups, where the total is 250.

Note

The following non-default CoPP values were used for some protocols for the verified topology scale numbers.
Table 2. Non-Default CoPP Values Used for vPC Verified Topology
Default Values Non-Default Values
class copp-s-routingProto2 
    police pps 1300  
class copp-s-routingProto1 
    police pps 1000  
class copp-s-pimreg 
    police pps 200  
class copp-s-lldp
    police pps 500
class copp-s-routingProto2 
    police pps 500 
class copp-s-routingProto1 
    police pps 1500 
class copp-s-pimreg 
    police pps 600  
class copp-s-lldp
    police pps 800 
Table 3. Non-VPC Scale Numbers of Cisco Nexus N3548-X Switches

Feature

Verified Topology

Verified Maximum

Active VLANs per switch

605 (MST Mode)

507 (RSTP Mode)

4013 ( MSTP Mode)

BFD neighbors

16

32

MTU

9,216

9,216

STP logical interfaces

2,500

9000

MST instances

1

64

MAC table size

7375 (90% approx.)

65532 (Non-warp Mode)

8192 (Warp Mode)

Port Channels

7 Non-vPC port-channels

24

Number of member ports per Port Channel

9

24

Number of system logging destination ports

0

8

SPAN sessions

4 Active sessions

7

4

Layer 3 physical interfaces

10

48

Layer 3 SVI, subinterfaces, EtherChannels

250

1024

VRF

11

200

IPv4 hosts

7400 (90% approx.)

65,535 (Normal Mode)

8196 (Warp Mode)

IPv4 routes (LPM)

3700 (Non-vPC , WARP mode)

24,576 (Non-vPC, Normal Mode)

4096 (Warp Mode)

Multicast routes

3680 (Non-vPC, WARP mode)

8192 (VPC Normal Mode)

4096 (Non-VPC, Normal Mode)

IGMP Snooping groups

3,000

8192

ECMP

8

2-way

32-way

TCAM entries for ACL

384 ingress (Normal mode)

128 ingress (WARP mode)

3000 Ingress, 1000 Egress

HSRP

256

500

VRRP

250

9

256

Configurable QoS groups

4

4

BGP neighbors

10

100

OSPF neighbors

10 (in a single area, area 0)

150

PIM neighbors

100

250

NAT translations

10

1023

Multicast Service Reflection sessions

400

1023 (Regular mode)

2047 (Fast Pass mode)

7 Allows same SPAN source in a single direction in 2 SPAN sessions with difference destinations.
8 Only supported in Normal Traffic Forwarding mode.
9 A combination of HSRP and VRRP groups, where the total is 250.