Cisco Systems IGX 8400 manual UXM-E in Trunk Mode, Routing over Cell Trunks Only, Cbr, Vbr, Abr

Page 13

Universal Switching Module Enhanced

•8.3 and 9.3

•9.4 and the public network

Step 2 Configure trunk 8.1, 8.2, and 8.3 to use VPC 101, 102, and 103, respectively.

Step 3 Add 3 VPC connections from 9.1, 9.2, and 9.3 to 9.4. At the far end, use the same VPCs.

Routing over Cell Trunks Only

You can specify trunk cell routing only as an option when you add a connection between UXM-E, ASI, or BXM ports. When you enable trunk cell routing, switch software routes across only the cell-based trunk cards BNI, BXM, and UXM-E: no conversion to FastPackets occurs on the route. If you disable trunk cell routing, the routing process can select a FastPacket-based trunk and so decrement the number of available gateway connections. Also, using a FastPacket-based trunk may result in increased network delays. Therefore, enabling trunk cell routing is the preferred choice when you add a connection at a BNI, BXM, or UXM-E.

If you add connections at other port cards, such as a UFM or ALM/A, switch software does not display the trunk cell routing option.

On the CLI, the addcon prompt for this option appears as “trunk cell routing restrict y/n?” It appears after you enter either the ATM class of service or after you finish specifying all the individual bandwidth parameters that apply to the current connection type. You can specify whether the default for trunk cell routing is “Yes” or “No” through the cnfnodeparm (superuser) command.

The UXM-E in Trunk Mode

The UXM-E trunk can communicate ATM cells that originated at an ATM endpoint or—through its on-board gateway functionality—FastPacket-based traffic such as voice, data, and Frame Relay. A UXM-E trunk can connect to the following trunk cards:

•

•

UXM-E

BXM

Types of Supported Traffic

As previously stated, the UXM-E trunk can connect to only another UXM-E trunk or a BXM trunk. On the other hand, the types of traffic that traverse a UXM-E trunk can originate at ATM ports or other types of ports. The types of traffic that a cell on a UXM-E trunk can carry appear in Table 4-7. Table 4-7shows the traffic types that ATM cells can carry where the payload originated as a FastPacket.

Table 4-7 Traffic from FastPacket-Based Cards

Traffic Type

Timestamped

Non-timestamped

Voice

Bursty data A

Bursty data B

High priority

CBR, VBR, ABR

Trunk Cards 4-13

Page 12 Page 14
Image 13
Page 12 Page 14
Contents Trunk Cards Trunk Front Cards Card Acronym Card Name Trunk Interface CardsTrunk Operating Modes Trunk Card MaintenanceLoopback Test Universal Switching Module Enhanced Introduction to the UXM-E Trunk ModeExample Networks with UXM-Es Determining the UXM-E’s Mode of OperationUXM-Es in a Network with Heterogeneous Traffic UXM-E Trunk FeaturesBack Cards for the UXM-E UXM-E InterfacesCard Name Card Description UXM-E Front Card Maximum Number of UXM-Es Switchover to a Redundant UXM-ECabled UXM-E Redundancy UXM-E Status LEDs Fail Active Standby Status of CardCard Mismatch Cellbus Bandwidth UsageUXM-E as a Clock Source OC3 Planning for Cellbus Bandwidth AllocationATM Across a Public ATM Network Calculating Cellbus Bandwidth ChangesRouting over Cell Trunks Only UXM-E in Trunk ModeTypes of Supported Traffic Traffic from FastPacket-Based Cards Traffic TypeInverse Multiplexing over ATM on IGX Trunks Types of Connections on a UXM-E TrunkAdding an IGX Feeder Line Redundancy Adding and Removing IMA Group LinksTwo-Segment Connections IMA ProtocolRouting Feeder Connection Cell Endpoint a Endpoint B Type Gateway Type Routing Load TypeFeeder Connection Cell Endpoint a Endpoint B Type Three-Segment ConnectionsRT-VBR Gwtypenone ABR.FST GwtypenoneUXM-E Atfr Activation and Configuration of a UXM-E in Trunk ModeOC3 STM1 SMF 20Cisco IGX 8400 Series Reference SCR and PCR Policing at Less than 50 CPS on UXM-E Alarms for Physical Lines and Logical TrunksBXM IGX-UXM-E10 PCR Policing Application Example Trunk Statistics for TroubleshootingUXM-E Interface Cards Summary StatisticsConnector/Indicator Function Connectors and LEDs for SMF and MMF Back CardsOC-3/STM1 Back Cards 11 BC-UAI-4-155-SMF Faceplate 12 BC-UAI-2-155-SMF Faceplate T3 Back CardsConnectors/Indicator Function Connectors and LEDs for BC-UAI-6-T3 and BC-UAI-3-T3BC-UAI-6-T3 Faceplate 14 BC-UAI-3-T3 Faceplate E3 Back CardsBC-UAI-6-E3 Faceplate Connectors and LEDs for BC-UAI-6-E3 and BC-UAI-3-E316 BC-UAI-3-E3 Faceplate T1 Back CardsBC-UAI-8-T1-DB-15 Faceplate 18 BC-UAI-4-T1-DB-15 Faceplate E1 Back CardsBC-UAI-8-E1 DB-15 Faceplate Port 21 BC-UAI-4-E1 DB-15 Faceplate 22 BC-UAI-4-E1 BNC Faceplate NTM Status Cable Redundancy for the NTMNetwork Trunk Module BC-T1 Faceplate Description T1 Interface Card BC-T1BC-T1 Connections and Status LEDs 23 BC-T1 FaceplateE1 Interface Back Card BC-E1 RX-TX BC-E1 Connections and Status LEDsSubrate Interface Card BC-SR BC-SR Connections and Status LEDs Connection/Indicator FunctionY1 Interface Back Card BC-Y1 RX MON BC-Y1 Connections and Status LEDsTX MON 46Cisco IGX 8400 Series Reference
Top Page Image Contents