Verified Scalability Limits
This document describes the Cisco NX-OS configuration limits for the Cisco Nexus 3232C and 3264Q switches.
Introduction
The values provided in this guide should not be interpreted as theoretical system limits for Cisco Nexus 3232C or 3264Q hardware or Cisco NX-OS software. These limits refer to values that have been validated by Cisco. They can increase over time as more testing and validation is done.
Verified Scalability Limits (Unidimensional)
The tables in this section list the unidimensional verified scalability limits for Cisco NX-OS Release 7.0(3)IX1(2) on the Cisco Nexus 3232C and 3264Q switches. The values provided in these tables focus on the scalability of one particular feature at a time.
Each number is the absolute maximum currently supported by this Cisco NX-OS release for the corresponding feature. If the hardware is capable of a higher scale, future software releases might increase this verified maximum limit. Results might differ from the values listed here when trying to achieve maximum scalability with multiple features enabled.
Table 1 Interfaces Verified Scalability Limits (Unidimensional) Feature
3232C Verified Limit
3264Q Verified Limit
BFD sessions
256
256
Port channel links
32
32
SVIs
400
400
vPCs
100
60
Table 2 Layer 2 Switching Verified Scalability Limits (Unidimensional) Feature
3232C Verified Limit
3264Q Verified Limit
MST instances
64
64
MST virtual ports
48,000
48,000
RPVST virtual ports
12,000
12,000
VLANs
3900
3900
VLANs in RPVST mode
500
500
Note
The number of supported VLANs per vPC should be within the MST or RPVST virtual port count specified in this table, depending on the topology.
Table 3 Multicast Routing Verified Scalability Limits (Unidimensional) Feature
3232C Verified Limit
3264Q Verified Limit
IPv4 multicast routes
10,000
10,000
Outgoing interfaces (OIFs)
40
40
IGMP snooping groups
10,000
10,000
PIM neighbors
200
200
Note
These multicast scalability numbers are for Layer 2 and Layer 3.
Note
Graceful restart is not supported when unicast or multicast aggressive timers are configured at any scale.
Table 4 Security Verified Scalability Limits (Unidimensional) Feature
3232C Verified Limit
3264Q Verified Limit
IPv4 ingress ACLs (lite TCAM region)
2304 (per network forwarding engine)
2304 (per network forwarding engine)
IPv4 ingress ACLs (non-lite TCAM region)
768 (per network forwarding engine)
768 (per network forwarding engine)
IPv4 egress ACLs (non-lite TCAM region)
768 (per network forwarding engine)
768 (per network forwarding engine)
IPv6 ingress ACLs (non-lite TCAM region)
768 (per network forwarding engine)
768 (per network forwarding engine)
IPv6 egress ACLs (non-lite TCAM region)
256 (per network forwarding engine)
256 (per network forwarding engine)
Note
These ACL scalability numbers were verified with all TCAM regions freed up except the CoPP system and ingress system TCAM regions.
Table 5 System Management Verified Scalability Limits (Unidimensional) Feature
3232C Verified Limit
3264Q Verified Limit
SPAN and ERSPAN
Configurable SPAN and ERSPAN sessions
32
32
4
4
Active localized SPAN or ERSPAN sessions3
4
4
Source interfaces per SPAN or ERSPAN session (Rx and Tx, Rx, or Tx)
48
48
Destination interfaces per SPAN session
1 (physical interface)
1 (physical interface)
Source VLANs per SPAN or ERSPAN session
32
32
1 A single forwarding engine instance supports four SPAN or ERSPAN sessions. If the first three sessions have bidirectional sources, the fourth session might have hardware resources only for Rx sources, depending on the SPAN or ERSPAN source's forwarding engine instance mappings.2 If the ERSPAN ACL contains access control entries (ACEs) with the set-erspan-gre-proto or set-erspan-dscp action, then only one ERSPAN session can be up.3 The number of SPAN or ERSPAN sessions reduces to two if the same interface is configured as the bidirectional source in more than one session.
Table 6 Unicast Routing Verified Scalability Limits (Unidimensional) Feature
3232C Verified Limit
3264Q Verified Limit
Unicast Routing
BGP neighbors
512 (IPv4 only)
512 (IPv6 only)
256 (IPv4) + 256 (IPv6)
512 (IPv4 only)
512 (IPv6 only)
256 (IPv4) + 256 (IPv6)
EIGRP neighbors
128 (IPv4)
128 (IPv6)
64 (IPv4) + 64 (IPv6)
128 (IPv4)
128 (IPv6)
64 (IPv4) + 64 (IPv6)
EIGRP routes
20,000
20,000
HSRP groups
400
400
IPv4 ARP
Default system routing mode: 32,000
ALPM routing mode: 8000
Default system routing mode: 32,000
ALPM routing mode: 8000
IPv4 host routes
Default system routing mode: 104,000
ALPM routing mode: 8000
Default system routing mode: 104,000
ALPM routing mode: 8000
IPv6 host routes
Default system routing mode: 52,000
ALPM routing mode: 4000
Default system routing mode: 52,000
ALPM routing mode: 4000
IPv6 ND
Default system routing mode: 32,000
ALPM routing mode: 4000
Default system routing mode: 32,000
ALPM routing mode: 4000
IPv4 unicast routes (LPM)
Default system routing mode: 12,000
ALPM routing mode: 128,000
Default system routing mode: 12,000
ALPM routing mode: 128,000
IPv6 unicast routes (LPM)
Default system routing mode: 6000 (<=64) + 1000 (65-127)
ALPM routing mode: 16,000 (20,000 with TCAM ALPM carving)
Default system routing mode: 6000 (<=64) + 1000 (65-127)
ALPM routing mode: 16,000 (20,000 with TCAM ALPM carving)
MAC addresses
30,000
30,000
OSPFv2 neighbors
256
256
OSPFv3 neighbors
256
256
VRFs
2000
2000
VRRP groups
250
250
Note
Graceful restart is not supported when unicast or multicast aggressive timers are configured at any scale.
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