Introduction
This document describes the Cisco Nexus® configuration limits for Cisco Nexus® 3550-T switches.
The values provided in this guide should not be interpreted as theoretical system limits for Cisco NX-OS 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.
 Note |
The documentation set for this product strives to use bias-free language. For the purposes of this documentation set, bias-free is defined as language that does not imply discrimination based on age, disability, gender, racial identity, ethnic identity, sexual orientation, socioeconomic status, and intersectionality. Exceptions may be present in the documentation due to language that is hardcoded in the user interfaces of the product software, language used based on RFP documentation, or language that is used by a referenced third-party product. |
Verified Scalability Limits - Unidimensional
The tables in this section list the verified scalability limits for the Cisco Nexus® 3550-T switches for Cisco NX-OS Release: 10.1(2t)E1(0).
These limits are validated with a unidimensional configuration. The values are provided in these tables focus on the scalability of one particular feature at a time.
Each number is the absolute maximum that is currently supported by this Cisco NX-OS release for the corresponding feature. If the hardware is capable of a higher scale, future software releases could increase this verified maximum limit. Results might differ from the values that are listed in this guide when you try to achieve maximum scalability with multiple features enabled.
|
Feature |
Verified Limits |
|---|---|
|
DHCP clients per switch |
1 DHCP client (on management port only) |
|
Port channel |
12 (1 PO per quad; Total 12 quads x 4 ports=48 ports) |
|
SVIs |
255 (1 SVI is reserved) |
|
Static Network Address Translation (NAT) |
1024 |
|
Feature |
Verified Limits |
|---|---|
|
MAC addresses |
SMAC table: 384 DMAC table: 768 |
|
MST instances |
Only default MST is allowed in Cisco Nexus® 3550-T switches |
|
VLANs |
255 |
|
Feature |
Verified Limits |
|---|---|
|
Outgoing interfaces (OIFs) |
40 (SVI + physical layer 3) or 48 (only on Access port or physical layer 3) |
|
48 OIFs for 384 mroutes |
|
|
IGMP snooping groups |
768 |
|
PIM neighbors |
48 |
|
Maximum number of Multicast routes |
384 |
Note |
High availability (graceful restart and stateful switchover) is not supported when unicast or multicast aggressive timers are configured at any scale. |
|
Feature |
Verified Limits |
|---|---|
|
ACLs |
Ingress - 1024 IPv4 |
Note |
Only 62 unique ACLs can be configured. Each ACL takes one label. If the same ACL is configured on multiple interfaces, the same label is shared. If each ACL has unique entries, the ACL labels are not shared, and the label limit is 62. |
|
Feature |
Verified Limits |
|---|---|
|
Unicast Routing |
|
|
BGP neighbors |
10 (IPv4) |
|
IPv4 ARP |
24000 (upto 2000 per Quad and 4000 system scale) |
|
IPv4 host routes 4 |
36000 (upto 3000 per Quad) |
|
IPv4 VLSM Routes |
Upto 1000 per Quad and 1000 system scale |
|
OSPF areas |
5 areas |
|
OSPFv2 neighbors |
6 |
|
Static routes |
512 System scale |
|
VRRP groups per interface or I/O module |
200 (1 VRRP group per interface, 20 VRRP groups system wide) |
Note |
|
Guidelines and Limitations for OSPF Verified Scalability Limits
-
To achieve the highest scale, we recommend that you use a single OSPF instance instead of multiple instances.
-
Each OSPFv2 scale value might vary when combined with other parameters.
-
The graceful restart timeout value might be increased in multidimensional scenarios.
Verified Scalability Limits - Multidimensional
The tables in this section list the verified scalability limits for the Cisco Nexus® 3550-T switch for Cisco NX-OS Release: 10.1(2t)E1(0). These limits are validated with a multidimensional configuration. The values provided in these tables focus on the scalability of all listed features at the same 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.
Attention |
These numbers are not the maximum verified values if each feature is viewed in isolation. For these numbers, see the "Verified Scalability Limits - Unidimensional" section. |
|
Feature |
Verified Limits |
|---|---|
|
Number of 10G ports |
48 |
|
BGP neighbors |
6 |
|
BGP IPv4 /32 unicast routes |
1000 |
|
BGP IPv4 VLSM unicast routes |
500 |
|
OSPFv2 neighbors |
6 |
|
OSPF IPv4 /32 unicast routes |
1600 |
|
PIM neighbors |
190 |
|
ACL ACEs |
400 |
|
Feature |
Verified Limits |
|---|---|
|
BGP neighbors |
6 |
|
BGP + OSPF IPv4 unicast routes |
1000 |
|
OSPFv2 neighbors |
6 |
|
OSPF IPv4 /32 unicast routes |
1600 |
|
PIM neighbors |
190 |
|
IPv4 (*,G) multicast routes |
320 |
|
ACL ACEs |
400 (IPv4) |
|
Feature |
Verified Limits |
|---|---|
|
MAC addresses |
690 |
|
OSPFv2 neighbors |
6 |
|
OSPF IPv4 /32 unicast routes |
1000 |
|
VLAN |
200 |
|
SVI |
200 |
|
VRRP v4 groups |
200 VRRP |
|
PIM neighbors |
190 |
|
IPv4 (*,G) multicast routes |
320 |
|
IGMP snooping database entries |
2000 |
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