Scalability IP Address VLAN and Routing Maximum Values

The following table lists the switch scalability values for the areas of VLANs, ACLs, hardware, ARP, and routing.

Subject Maximum
IPv4 ACLs

total named (extended or standard)

Up to 2048 (minus any IPv4 numeric standard or extended ACL assignments and any RADIUS-assigned ACLs)[1]

total numbered standard

Up to 99[1]

total numbered extended

Up to 100[1]

total ACEs in all IPv4 ACLs

Up to 3072[1]
Layer-3

VLANs with at least one IP Address

512

IP addresses per system

2048 IPv4

2048 IPv6[2]

IP addresses per VLAN

32[3]

Static routes (IPv4 and IPv6 combined)

256

IPv4 host hardware table

72 K (8K internal, 64K external)

IPv4 BMP hardware table

2 K
ARP

ARP entries

25,000

Packets held for ARP resolution

25
Dynamic Routing

Total routes supported

IPv4 only: 10,000 (including ARP)

IPv4 and IPv6: 10 K (IPv4) and 3 K

(IPv6)[4]

IPv6 only: 5 K[5]

IPv4 Routing Protocol

RIP interfaces

128
IPv6 Routing Protocol

DHCPv6 Helper Addresses

32 unique addresses; multiple instances of same address counts as 1 towards maximum

[2] These limits apply only to user-configured addresses and not to auto-configured link local and prefix IPv6 addresses. A maximum configuration could support up to 2048 user-configured and 2048 auto-configured IPv6 addresses for a total of 4096.

[3] There can be up to 32 IPv4 and 32 user-configured IPv6 addresses on a single VLAN. In addition, each VLAN is limited to 3 auto-configured prefix-based IPv6 addresses.

[4] Configured as an ABR for OSPF with four IPv4 areas and four IPv6 areas.

[5] Configured as an ABR for OSPF with two IPv6 OSPF areas.