Brocade Communications Systems 53-1002163-02 manual Access control, Trunking

Layer 2 Ethernet overview 1

When setting the scheduling policy, each priority group that is using DWRR scheduling can be set to use a percentage of the total bandwidth by setting the PG_Percentage parameter.

For detailed information on configuring QoS, see “Configuring QoS” on page 107.

Access control

Access Control Lists (ACLs) are used for Layer 2 switching security. Standard ACLs inspect the source address for the inbound ports. Extended ACLs provide filtering by source and destination addresses and protocol. ACLs can be applied to the CEE ports or to VLANs.

ACLs function as follows:

•A standard Ethernet ACL configured on a physical port is used to permit or deny frames based on the source MAC address. The default is to permit all frames.

•An extended Ethernet ACL configured on a physical port is used to permit or deny frames based on the source MAC address, destination MAC address, and EtherType. The default is to permit all frames.

•A standard Ethernet ACL configured on a LAG virtual port is used to permit or deny frames based on the source MAC address. The default is to permit all frames. LAG ACLs apply to all ports in the LAG.

•An extended Ethernet ACL configured on a LAG virtual port is used to permit or deny frames based on the source MAC address, destination MAC address, and EtherType. The default is to permit all frames. LAG ACLs apply to all ports in the LAG.

•A standard Ethernet ACL configured on a VLAN is used to permit or deny frames based on the source MAC address. The default is to permit all frames. VLAN ACLs apply to the Switch Vertical Interface (SVI) for the VLAN.

•An extended Ethernet ACL configured on a VLAN is used to permit or deny frames based on the source MAC address, destination MAC address, and EtherType. The default is to permit all frames. VLAN ACLs apply to the Switch Vertical Interface (SVI) for the VLAN.

For detailed information on configuring ACLs, see “Configuring ACLs” on page 101.

Trunking

NOTE

The term “trunking” in an Ethernet network refers to the use of multiple network links (ports) in parallel to increase the link speed beyond the limits of any one single link or port, and to increase the redundancy for higher availability.

802.1ab Link Layer Discovery Protocol (LLDP) is used to detect links to connected switches or hosts. Trunks can then be configured between an adjacent switch or host and the Brocade FCoE hardware using the VLAN classifier commands. See “Configuring an interface port as a trunk interface” on page 50.

The Data Center Bridging (DCB) Capability Exchange Protocol (DCBX) extension is used to identify a CEE-capable port on an adjacent switch or host. For detailed information on configuring LLDP and DCBX, see “Configuring LLDP” on page 87.

The 802.3ad Link Aggregation Control Protocol (LACP) is used to combine multiple links to create a trunk with the combined bandwidth of all the individual links. For detailed information on configuring LACP, see “Configuring Link Aggregation” on page 79.

Converged Enhanced Ethernet Administrator’s Guide	7
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