Cisco Gigabit Ethernet Network Module Overview

The Cisco Gigabit Ethernet Network Module NM-1GE brings Gigabit Ethernet to the Cisco 2691, Cisco 3660, Cisco 3725, Cisco 3745, Cisco 3825 and Cisco 3845.

The Cisco Gigabit Ethernet Network Module enables branch offices to cost-effectively utilize high-speed uplinks in a variety of environments. The enhanced performance allows customers to enable new applications and services as well as providing greater capacity for existing inter-VLAN routing and bridging capabilities. Additionally, branch offices will now have the opportunity to connect to metropolitan-area networks (MANs).

Cisco Gigabit Ethernet Network Module

I　Key Features of Cisco Gigabit Ethernet Network Module

i　Ethernet and VLAN Features

• IEEE802.3 with IEEE802.2 Service Advertising Protocol (SAP)

• IEEE802.3 with IEEE802.2 and Subnetwork Access Protocol (SNAP)

• IEEE 802.1Q virtual LAN (VLAN) tagging

• Cisco Inter-Switch Link (ISL) support

• Flow control (802.3x)

ii　Network Management-Related Features

• CiscoView

• Simple Network Management Protocol (SNMP) support

• Remote Monitoring (RMON) support

• Cisco's NetFlow accounting

iii　QoS Features

• Weighted Random Early Detection

• Precedence setting and mapping (802.1p)

• Committed Access Rate (CAR)

• Access control list (ACL)

• Extended ACLs

• Voice and remaining QoS features, per platform and Cisco IOS Software version

II　Appliance in Branches

In a branch office, the Cisco Gigabit Ethernet Network Module can provide a high-speed uplink. The following figure shows the module being used to bridge non-routable protocols while simultaneously providing Layer 3 connectivity. The module is also useful in situations that require inter-VLAN routing with an ISL or IEEE 802.1q trunk, and in any LAN requiring fiber connectivity.

Gigabit Ethernet in LANs

Figure following shows the Cisco Gigabit Ethernet Network Module being used to connect Layer 3 VPNs over a MAN. Cisco IOS Software enables QoS applications such as traffic shaping and NBAR. Again, this is ideal for situations in which fiber connectivity is desirable.

Gigabit Ethernet in MANs

III　Maximum Cisco Gigabit Ethernet Network Module Support in difference devices

The table shows the comparison about the maximum Cisco Gigabit Ethernet Network Module support in difference devices: