2 Network Elem ent Interface s
2 Network Element Interfaces
2.1 Tellabs 8609 Access Switch
2.1.1 Overview
The Tellabs 8609 access switch provides fixed Ethernet interfaces and two slots for the Line
Modules (LM). The NE suppo rts numerous layer 2 and 3 protocols need ed on the edg e of the data
network to adapt various TDM, cell and packet based services to the IP/MPLS.
2.1.2 Fixed Interfaces
The Tellabs 8609 access switch supports up to 12 Ethernet interfaces, w hich are fixedtothe
chassis of the NE. There are tw o virtual modules, M0 and M1, with each comprising of 4 Ethernet
interfaces that support 100/1000BASE-X modes, in total there are 8 optical Gigabit Ethernet
interfaces available. An additional virtual module M2, comprises 4 Ethernet interfaces that support
10/100BASE-TX/1000 BASE-T modes.
Ethernet Interfaces
The E thernet interface functionality is implem ented according to [IEEE 802.3]. At ingress, the
Ethernet interfaces accept frames with length or type encoding. The length encapsulated frames
support LLC/SNAP according to [IEEE 802.3]. At egress, the Ethernet interface always generates
frames with type encapsulation.
The NE supports VLAN tagging on Ethernet interfaces. All interfaces can accept VLAN
tagged, priority -tagged and untagged frames. T h e interface performs input filtering based on the
VLAN identifiers. The Ethernet ports can be configured to optionally discard all untagged and
priority-tagged frames. A VLAN identifier can be selected from the full VLAN identifier space
(1–4095 are valid values, 0 and 4096 are reserved).
The Ethernet interfaces support:
• Full duplex m ode for 100/1000BASE-X interfaces
• Auto-negotiation function, which can be optionally disabled. In such cases a manually configured
operation mode (speed, half/full duplex) is used
• 256 VLANs per port
• Port based Ethernet PWE3 [RFC4448]
• Ethernet tagged mode PWE3 [RFC4448]
• Jumbo frames with the MTU values of up to 4470 bytes
• Port shaper, which limits the egress bandwidth of the Ethernet interface. The limit is user-con-
figurable
Tellabs
®
8600 Man aged Edge System 76.8610-50149A
Tellabs
®
8609 Access Switch FP1.0 Tellabs
®
8611 Access Switch FP1.1 Interface Configuration Guide © 2011 Tellabs.
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