C H A P TER 4 Trunk Cards This chapter describes the hardware and functionality of IGX trunk cards. The description of each card includes: • • • Function System interconnect Faceplate indicators Other publications that relate to IGX operation are: • The Cisco IGX 8400 Series Installation and Configuration publication describes installation, troubleshooting, user commands, repair and replacement, and the rack-mount Cisco IGX 8420-to-IGX 8430 conversion.
Trunk Interface Cards Trunk Interface Cards This section describes the IGX trunks. The card groups are: • • Universal switching module enhanced (UXM-E) Network trunk module (NTM) Note With Release 9.2 and later software, an Cisco IGX 8420 or 8430 switch can support a maximum of 32 trunks. Table 4-1 lists the trunk front cards, and Table 4-2 lists the corresponding trunk interface back cards.
Common Alarms, Controls, and Indicators Trunk Operating Modes IGX trunk cards operate in either simple gateway or cell forwarding mode. Simple gateway supports service interworking, which lets Frame Relay connections terminate at ATM endpoints. For a description of simple and complex gateways, service and network interworking, tiered networks, trunks, ATM protocols, and cell and header formats, refer to the Cisco Systems Overview.
Universal Switching Module Enhanced Universal Switching Module Enhanced This description of the universal switching module (UXM-E) covers the following topics: • An introduction includes sections on the UXM-E mode of operation, trunk-mode features, interface card list, card redundancy, card mismatch, clock sourcing, cellbus bandwidth usage, configuration for public ATM network service, and configuration for cell trunk-only routes • • • • • • Supported traffic and connection types Inverse multiplexing o
Universal Switching Module Enhanced Determining the UXM-E’s Mode of Operation The UXM-E detects reports its mode of operation to switch software when you first activate either a trunk to the network or a line on the UNI or NNI. If you activate a trunk, the UXM-E goes into trunk mode. If you activate a line, the UXM-E goes into port mode. The CLI commands for these operations are uptrk and upln, respectively.
Universal Switching Module Enhanced voice connection between a CVM and CDP. Connection E is a local connection (DAXCON) between a UFM and a UXM-E UNI port on the same node. For connections C–E, the gateway function of the UXM-E packs and unpacks the FastPackets into and out of the ATM cells.
Universal Switching Module Enhanced • The maximum throughput is 310 Mbps—two times the OC-3 (STM1) rate. This maximum applies whether the back card is a 2-port or 4-port back card. In practical application, this maximum rate means that most trunk applications with an OC-3 interface would use the 2-port back card. • • The UXM-E supports ATM-to-Frame Relay network and service interworking. • • • The UXM-E supports Y-cable redundancy with hot standby for very fast switchover.
Universal Switching Module Enhanced Figure 4-3 UXM-E Front Card Minor Major Fail Active Standby 29424 UXME 4-8 Cisco IGX 8400 Series Reference
Universal Switching Module Enhanced Table 4-5 UXM-E Status LEDs Fail Active Standby Status of Card On Off Off Failed Blinking Blinking Off Back Card Mismatch (hot standby) Blinking On Off Back Card Mismatch (active)—can be missing back card Blinking Off Blinking Back Card Mismatch (self-test) Blinking Off On Back Card Mismatch (standby) Off Blinking Off Hot Standby Off On Off Active Off Off Blinking Self-test Off Off On Standby On On On Down Maximum Number of U
Universal Switching Module Enhanced Card Mismatch The UXM-E supports two types of card mismatch notification. The notification common to all cards occurs when you connect an unsupported back card to the front card. The mismatch notification unique to the UXM-E occurs if you attach a supported back card but one that has a different interface or a smaller number of the correct line types than what the UXM-E previously reported to software.
Universal Switching Module Enhanced The card-based default and maximum cellbus bandwidth for each interface appears in Table 4-5. Note that FastPackets require substantially less cellbus bandwidth than ATM cells. The FastPacket requirements in the figure and table reflect the restriction of FastPackets to one lane and the maximum processing rate of the gateway on the UXM-E.
Universal Switching Module Enhanced Calculating Cellbus Bandwidth Changes To determine how many UBUs are necessary, use the values for average bandwidth used in the following formula: fps -------- + cps 2 UBUs = ----------------------4000 In most circumstances, the fps and cps values from average bandwidth used are sufficient. The peak bandwidth used values are primarily informational. The information in Table 4-5 provides the ranges for the interface type.
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.
Universal Switching Module Enhanced Types of Connections on a UXM-E Trunk This section introduces the connections that a UXM-E trunk supports. The context of each description is the trunk rather than the connection endpoints. The purpose of these descriptions is not only to inform but also help you plan the network. Some definitions overlap because a connection may qualify as more than one type. • A Cell connection carries information that exists in ATM cell format throughout the path.
Universal Switching Module Enhanced IMA characteristics are as follows: • • All physical ports of an IMA trunk use the same line configuration. The node maintains a set of retained links for the IMA trunk to keep it active. The IMA trunk does not fail unless the number of active trunks is less than the user-specified number of retained links. • The IMA trunk can provide a clock source or clock path (see cnftrk command). The first (the lowest numbered) available physical line is used.
Universal Switching Module Enhanced Adding and Removing IMA Group Links When you configure an IMA trunk through Cisco WAN Manager or the cnftrk command, you enter the number of retained links. This represents the number of ports that must remain active for the IMA trunk itself to remain active. If a physical line goes out of service, but the number of active lines is at least as great as the retained links value, the IMA trunk remains active even though the node goes into major alarm.
Universal Switching Module Enhanced Figure 4-7 shows an example of IMA protocol overhead. In the example, DS0 1 is reserved for an IMA group with 1 to 4 physical lines and DS0 2 is reserved for an IMA group with 5 to 8 physical lines. IMA Protocol IGX-hub 6 1 U X ME U X ME 5 1 IGX-feeder 6 2 U X ME 3 4 U X ME 6 1 29453 Figure 4-7 Trunk 8.
Universal Switching Module Enhanced Routing Endpoint A Feeder Endpoint B BXM Connection Type VCC or VPC ATFST UXM-E UFM FRM Gateway Type Cell Routing Load Type GW_TYPE_NWI N/A BDATB_LOAD UFM ATFR N/A GW_TYPE_NWI N/A BDATA_LOAD FRM ATFST N/A GW_TYPE_NWI N/A BDATB_LOAD UFM ATFR N/A GW_TYPE_NWI N/A BDATA_LOAD ATFST N/A GW_TYPE_NWI N/A BDATB_LOAD ATFX N/A GW_TYPE_SIWX N/A BDATA_LOAD ATFXFST N/A GW_TYPE_SIWX N/A BDATB_LOAD ATFT N/A GW_TYPE_SIWT N/A BDATA_LOAD
Universal Switching Module Enhanced Feeder Endpoint A Feeder Endpoint B Connection Type VCC or VPC Gateway Type Cell Routing Load Type ABR.
Universal Switching Module Enhanced T1 • HCS masking (on or off) • Payload scramble (on or off) • Loop clock (enable/disable) • Line framing (ESF or D4) • Cable length (0 to 655 feet, ABAM cable only) • Idle code • Line coding (fixed as B8ZS) E1 • HCS masking (on or off) • Payload scramble (on or off) • Line DS0 map (timeslots 0 to 31 for unframed or 1 to 15 and 17 to 31 for framed format) • Loop clock • Idle code • Line coding (fixed as HDB3) • Receive line impedance (BNC fixed at 75 ohms; DB-15 fixed
Universal Switching Module Enhanced Alarms for Physical Lines and Logical Trunks Variations exist in the way switch software supports alarms for physical lines and logical trunks for a trunk-mode UXM-E. The following list summarizes the approach to physical lines and trunks: • • • • • A UXM-E trunk is mapped to a physical line object. • • For non-IMA trunks, the alarm includes the physical line alarm. A physical (non-IMA) trunk is mapped one-to-one with a physical line.
Universal Switching Module Enhanced Figure 4-10 shows an application example enabled by the PCR minimum value feature. In the example, less than 19.2 kbps Frame and ATM connections are set up across two carrier Frame and ATM networks with the policing function enabled at the boundary of the two carrier networks. The PCR value of segment 2 is set to the new minimum PCR policing value supported by the NNI facing BXM.
UXM-E Interface Cards Summary Statistics You can view summary statistics for a UXM-E trunk through Cisco WAN Manager or the CLI. The CLI commands are dspportstats and dsptrkstats. With dspportstats, you can view: • • • Port statistics IMA statistics ILMI/ILMI statistics With dsptrkstats, you can view: • • • Qbin statistics Gateway statistics Virtual interface statistics UXM-E Interface Cards This section provides basic information on the interface back cards for the UXM-E.
UXM-E Interface Cards • BC-UAI-4-E1-BNC OC-3/STM1 Back Cards The OC3/STM1 back cards for the UXM-E have the single-mode fiber (SMF), multimode fiber (MMF) and electrical connections. The cards are: • • • • • • BC-UAI-2-155-SMF BC-UAI-4-155-SMF BC-UAI-4-155-MMF BC-UAI-2-SMFXLR BC-UAI-4-SMFXLR BC-UAI-4-STM1E As indicated by the “2” or the “4” in the model number, these cards have two or four transmit and receive connectors. Each line has a tri-color LED whose color indicates its status.
UXM-E Interface Cards Figure 4-11 BC-UAI-4-155-SMF Faceplate UAI- 4-155 SMF R LOC Y REM G OK P O R T R X T X 1 R LOC Y REM G OK P O R T R LOC Y REM G OK R X T X 2 P O R T R LOC Y REM G OK P O R T R X T X 3 R LOC Y REM G OK P O R T R X 2 R X T X T X 4 FAIL H11697 ACTIVE Trunk Cards 4-25
UXM-E Interface Cards Figure 4-12 BC-UAI-2-155-SMF Faceplate UAI-2-155 SMF R LOC Y REM G OK P O R T R X T X 1 R LOC Y REM G OK P O R T R LOC Y REM G OK R X T X 2 P O R T 2 R X T X FAIL H11698 ACTIVE T3 Back Cards The T3 back cards for the UXM-E are BC-UAI-6-T3 and BC-UAI-3-T3. These cards have six and three pairs of BNC connectors, respectively. Each port has a tri-color LED whose color indicates its status.
UXM-E Interface Cards Table 4-13 Connectors and LEDs for BC-UAI-6-T3 and BC-UAI-3-T3 Connectors/Indicator Function Transmit jacks BNC connectors for transmit data. Receive jacks BNC connectors for receive data. Red (on the tri-color LED) On indicates line is active but a local alarm was detected. Yellow (on the tri-color LED) On indicates line is active but a remote alarm was detected. Green (on the tri-color LED) On indicates line is active. Fail light (red) An error was detected.
UXM-E Interface Cards Figure 4-14 BC-UAI-3-T3 Faceplate UAI 3T3 R LOC Y REM G OK TX P O R T 1 RX R LOC Y REM G OK R LOC Y REM G OK TX P O R T 2 TX RX P O R T R LOC Y REM G OK TX P O R T 3 RX 2 RX FAIL H11700 ACTIVE E3 Back Cards The E3 back cards for the UXM-E are the six-port BC-UAI-6-E3 and the three-port BC-UAI-3-E3. These cards have six and three pairs of SMB connectors, respectively. Each line has a tri-color LED whose color indicates its status.
UXM-E Interface Cards Table 4-14 Connectors and LEDs for BC-UAI-6-E3 and BC-UAI-3-E3 Connector/Indicator Function Transmit Jack BNC connector for transmit data. Receive Jack BNC connector for receive data. Red (on the tri-color LED) On indicates line is active but a local alarm was detected. Yellow (on the tri-color LED) On indicates line is active but a remote alarm was detected. Green (on the tri-color LED) On indicates line is active. Fail light (red) An error was detected.
UXM-E Interface Cards Figure 4-16 BC-UAI-3-E3 Faceplate UAI 3E3 R LOC Y REM G OK TX P O R T 1 RX R LOC Y REM G OK R LOC Y REM G OK TX P O R T 2 TX RX P O R T R LOC Y REM G OK TX P O R T 3 RX 2 RX FAIL H11702 ACTIVE T1 Back Cards The T1 back cards for the UXM-E are BC-UAI-8-T1-DB-15 and BC-UAI-4-T1-DB-15. These cards have eight and four DB-15 lines, respectively. Each line has a tri-color LED whose color indicates its status. If a card failure occurs, all the LEDs turn red.
UXM-E Interface Cards Table 4-15 Connectors and LEDs for BC-UAI-8-T1-DB-15 and BC-UAI-4-T1-DB-15 Connector/Indicator Function Four or eight DB-15s Each DB-15 connector carries transmit and receive data. Red (on the tri-color LED) On indicates line is active but a local alarm was detected. Yellow (on the tri-color LED) On indicates line is active but a remote alarm was detected. Green (on the tri-color LED) On indicates line is active.
UXM-E Interface Cards Figure 4-18 BC-UAI-4-T1-DB-15 Faceplate UAI-4T1 DB15 R LOC Y REM G OK P O R T 1 R LOC Y REM G OK R LOC Y REM G OK P O R T 2 P O R T R LOC Y REM G OK P O R T 3 R LOC Y REM G OK 2 P O R T H11706 4 E1 Back Cards The E1 back cards for the UXM-E are: • • • • BC-UAI-8-E1-BNC BC-UAI-8-E1-DB-15 BC-UAI-4-E1-BNC BC-UAI-4-E1-DB-15 As the model numbers indicate, the eight and four-port E1 cards can have either BNC or DB-15 connectors.
UXM-E Interface Cards Table 4-16 Connectors and LEDs for BC-UAI-8-E1 and BC-UAI-4-E1 Connector/Indicator Function Eight or four DB-15 connectors Each DB-15 connector carries transmit and receive data. Eight or four pairs of BNC connectors Each BNC connector carries traffic in one direction. Red (on the tri-color LED) On indicates line is active but a local alarm was detected. Yellow (on the tri-color LED) On indicates line is active but a remote alarm was detected.
UXM-E Interface Cards Figure 4-20 BC-UAI-8-E1 BNC Faceplate UAI-8EI BNC PORT 1 TX R LOC Y REM G OK RX PORT 2 PORT 2 TX TX R LOC Y REM G OK RX PORT 3 TX R LOC Y REM G OK R LOC Y REM G OK RX PORT 4 TX RX R LOC Y REM G OK RX PORT 5 TX R LOC Y REM G OK RX PORT 6 TX R LOC Y REM G OK RX PORT 7 TX R LOC Y REM G OK RX PORT 8 TX R LOC Y REM G OK H11705 RX 4-34 Cisco IGX 8400 Series Reference
UXM-E Interface Cards Figure 4-21 BC-UAI-4-E1 DB-15 Faceplate UAI-4E1 DB15 R LOC Y REM G OK P O R T 1 R LOC Y REM G OK R LOC Y REM G OK P O R T 2 P O R T R LOC Y REM G OK P O R T 3 R LOC Y REM G OK 2 P O R T H11707 4 Trunk Cards 4-35
UXM-E Interface Cards Figure 4-22 BC-UAI-4-E1 BNC Faceplate UAI-4EI BNC PORT 1 TX R LOC Y REM G OK RX PORT 2 PORT 2 TX TX R LOC Y REM G OK RX PORT 3 TX R LOC Y REM G OK R LOC Y REM G OK RX PORT 4 TX RX R LOC Y REM G OK H11708 RX 4-36 Cisco IGX 8400 Series Reference
Network Trunk Module Network Trunk Module The network trunk module (NTM) enables FastPacket transmission on a trunk.
Network Trunk Module For details on the significance of LEDs, see the Cisco IGX 8400 Series Installation manual. The alarms and line conditions that the NTM monitors include those in the list that follows. To view errors on a trunk, use the dsptrkerrs command. To see a list of the (user-specified) errors that dsptrkerrs can display, use dsptrkstatcnf.
Network Trunk Module Figure 4-23 BC-T1 Faceplate BC-T1 T1 input/output LOS (red) Red alarm (red) Yellow alarm (yellow) AIS (green) H8316 Fail (red) Active (green) Table 4-17 BC-T1 Connections and Status LEDs Connector/Indicator Function T1 input/output Female DB-15 connector for T1 line. LOS light (red) Indicates loss of signal at the local end. Red alarm light (red) Indicates loss of local E1 frame alignment, or it indicates loss of packet alignment on the NTM.
Network Trunk Module E1 Interface Back Card (BC-E1) The E1 trunk interface card (BC-E1) provides an E1 trunk interface for the network trunk module (NTM). The BC-E1 connects directly to the NTM and can reside in any rear slot 3 through 8 in an Cisco IGX 8410, 3 through 16 in an Cisco IGX 8420, or 3 through 32 in an Cisco IGX 8430. The BC-E1 provides the following: • • • Interfaces to CEPT E1 lines (CCITT G.
Network Trunk Module Figure 4-24 BC-E1 Faceplate BC-E1 RX/TX RX TX LOS (red) Red alarm (red) Yellow alarm (yellow) AIS (green) MFRA (red) MFYA (yellow) H8317 Fail (red) Active (green) Table 4-18 BC-E1 Connections and Status LEDs Connector/Indicator Function RX-TX Female DB-15 connector for XMT and RCV E1. RX BNC connector for receive E1 line. TX BNC connector for transmit E1 line. LOS light (red) Indicates loss of signal at the local end.
Network Trunk Module Subrate Interface Card (BC-SR) The back card/subrate (BC-SR) terminates subrate trunks on the NTM. A subrate trunk uses part of the E1 or T1 bandwidth. The BC-SR typically functions in tail circuits or where little traffic exists. A subrate trunk facility interface operates in DCE mode, and the subrate channel functions like a synchronous data channel. Therefore, the IGX BC-SR always operates in DTE mode. Only leased lines are supported (no dial-up lines).
Network Trunk Module Figure 4-25 BC-SR Faceplate BC-SR RS 449/MIL188 X.21 V.35 LOS (red) Bad Clk (red) Yellow alarm (yellow) DSR (green) DTR (green) RXD (green) TXD (green) H8318 Fail (red) Active (green) Table 4-19 BC-SR Connections and Status LEDs Connection/Indicator Function EIA/TIA-449 data connector DB-37 female connector X.21 data connector DB-15 female connector V.
Network Trunk Module Table 4-20 Data and Control Leads Supported with BC-SR Transmit Receive Lead Name Interface Lead Name Interface TX Transmit data All RX Receive data All RTS Request to Send V.35 CTS Clear to Send V.35 DTR/C Data Terminal Ready All DSR/I Data Set Ready All LL Local Loop EIA/TIA-422 DCD Data carrier select V.35 RL Remote Loop EIA/TIA-422 RI/IC Ring Incoming Call V.35 IS Terminal In Service EIA/TIA-422 TM Test mode V.35 SS Select standby V.
Network Trunk Module Figure 4-26 BC-Y1 Faceplate BC-Y1 Y1 trunk input/output Line in Line out RXMON - monitor jack TXMON - monitor jack LOS (red) Red alarm (red) Yellow alarm (yellow) AIS (green) H8319 Fail (red) Active (green) Table 4-21 BC-Y1 Connections and Status LEDs Connector/Indicator Function Y1 Trunk input/output DB-15 connector for Y1 trunk Line in Y1 trunk input line Line out Y1 trunk output line RX MON BNC test connector for monitoring receive Y1 line TX MON BNC test conne
Network Trunk Module 4-46 Cisco IGX 8400 Series Reference
