Per-Vlan Mac Learning Limit - Dell Force10 S4810P Configuration Manual

High-density, 1ru 48-port 10gbe switch

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Per-VLAN MAC Learning Limit

An individual MAC learning limit can be configured for each VLAN using Per-VLAN MAC Learning

One application of Per-VLAN MAC Learning Limit is on access ports. In the following illustration, an

Internet Exchange Point (IXP) connects multiple Internet Service Provider (ISP). An IXP can provide

several types of services to its customers including public and private peering. Public peering means that

all customers are connected to one VLAN. If one ISP wants to peer with another ISP, it establishes a BGP

peering session over this VLAN. Private Peering means that the IXP sets up a separate VLAN between two

customers that want to peer privately; only the ports of these two ISPs would belong to this VLAN and

they would peer via BGP. In the following illustration, Per-VLAN MAC Learning Limit is used on the

access ports for the ISPs that have subscribed to private and public peering since these access ports are

members of multiple VLANs.

ISP A, B, and C are all public peers through VLAN 10.

In addition, ISP A and C are private peers on a separate

VLAN, VLAN 20. Since the access ports for ISP A

and C are members of multiple VLANs, Per-VLAN MAC

Learning Limit can be applied to those ports.

Configure a MAC learning limit on a

Display the MAC learning limit

counters for a VLAN.

is available only on platform:

Internet Exchange Point

Command Syntax

mac learning-limit limit vlan vlan-id

show mac learning-limit

interface GigabitEthernet 1/1

mac learning-limit 1 vlan 10

mac learning-limit 1 vlan 20

interface slot/port

Command Mode

EXEC Privilege

Layer 2 | 627