Queue Buffers, Cpu Ubr | Cabletron Systems 04-0053-01 guide

Traffic Management

Traffic Management Capabilities

6.1.3Queue Buffers

ATM SmartSwitches perform buffering using a shared-memory architecture. Buffer space is divided into queues for each class of service. In turn, ports are allocated a portion of each of the service class queues. This allocation is controlled on a per-port basis by the porttrafficcongestion commands.

Quality of service is defined on an end-to-end basis in terms of cell loss ratio, cell transfer delay, and cell delay variation.

For example, enter the show porttrafficcongestion command to view current buffer utilization.

SmartSwitch # show porttrafficcongestion
PortNumber(ALL)	:

PortID QueueId ServiceClass MinIndex MinValue MaxIndex MaxValue

==============================================================================

CPU	1	CBR	10	64	15	1024
CPU	2	RTVBR	8	256	13	4096
CPU	3	NRTVBR	8	256	13	4096
CPU	4	ABR	8	256	12	8192
CPU	5	UBR	8	256	12	8192
PortID	QueueId ServiceClass MinIndex MinValue MaxIndex MaxValue

==============================================================================

7A1	1	CBR	10	64	15	1024
7A1	2	RTVBR	8	256	13	4096
7A1	3	NRTVBR	8	256	13	4096
7A1	4	ABR	8	256	12	8192
7A1	5	UBR	8	256	12	8192
PortID	QueueId ServiceClass MinIndex MinValue MaxIndex MaxValue

==============================================================================

7A2	1	CBR	10	64	15	1024
7A2	2	RTVBR	8	256	13	4096
7A2	3	NRTVBR	8	256	13	4096
7A2	4	ABR	8	256	12	8192
7A2	5	UBR	8	256	12	8192
PortID	QueueId ServiceClass MinIndex MinValue MaxIndex MaxValue

==============================================================================

7A3	1	CBR	10	64	15	1024
7A3	2	RTVBR	8	256	13	4096
7A3	3	NRTVBR	8	256	13	4096
7A3	4	ABR	8	256	12	8192
7A3	5	UBR	8	256	12	8192

More(<space>/q)?:

MinValue and MaxValue are thresholds set on a per-queue, per-port basis and are measured in cells (53 bytes). The MinValue threshold is the amount of buffer space guaranteed to a call of a particular service class on the corresponding port. The MaxValue threshold is the maximum amount of buffer space that a call of a particular service class is allowed on the corresponding port.

QoS corresponds to the queues as follows:

•Queue 1 — Constant Bit Rate (CBR)

•Queue 2 — Real Time Variable Bit Rate (rt-VBR)

•Queue 3 — Non-real time Variable Bit Rate (Nrt-VBR)

SmartSwitch ATM User Guide 6-5

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Cabletron Systems 04-0053-01 manual Queue Buffers, Cpu Ubr

Contents

Part Number 04-0053-01 Rev. a Order Number SmartSwitch ATM Switch User Guide Ii SmartSwitch ATM Switch User Guide FCC Class a Notice Manufacturer’s Name Application of Council DirectivesManufacturer’s Address Product Name Safety Information Class 1 Laser Transceivers Fiber Optic Protective Caps Regulatory Compliance Summary Safety Document Name Revision History Table of Contents Virtual Ports and Static Connections Index Table of Contents Xii SmartSwitch ATM User Guide List of Figures List of Figures Xiv SmartSwitch ATM User Guide List of Tables List of Tables Xvi SmartSwitch ATM User Guide Introduction Contents of the User Guide Smartswitch ATM Switch Differences Creating AN IP Over ATM Vlan IP Over ATM and LaneIP address is for example only Subnet mask is for example only Creating an IP over ATM Vlan IP Over ATM and Lane Default Netprefix for SmartSwitch 2500 Family Switches Default ATM Addressing for IP over ATMDefault Netprefix for SmartSwitch Default IP Over ATM Local Client Address Creating AN Emulated LAN Ilmi ATM Addressing for LAN Emulation SmartSwitch 2500 Family Default Lane Addressing Lecs address is constructed from SmartSwitch 6500 Default Lane AddressingChassis MAC address = 0020D4144180 Then CPU MAC address = 0020D4144180 Elan number = Then Chassis MAC address = 00001DA3870B Elan number = Then ELANs Across Multiple SwitchesChassis MAC address = 00001DA3870B Then Just for this example Switch ClientsDistributed Lane Services Specify the LES address on SW2 Use the add leselan command to create an LES on switch SW2 SW1 # show client Elan Join PoliciesBest Effort Elan Join Test By Route Descriptor By MAC Address Use ? to see possible types Weight the policy atLecselanlec Table Physical Versus Logical BUS Multicasting Lane Over WAN CircuitsNo MAC address is specified Elan is specified by Elan number Single PVP connection between clients and Lane services Lane Service Redundancy Using Lnni Lnni Redundant LECSs on same network Lane Load Sharing Lnni call set up load sharing How Lnni handles Elan join requests Setting up Lnni LECs SW1 # stop les SW1 # stop lecsSW1 # set lnniinfo SW2# set lnniinfo Similarly, create the same Elan elan1 on SW2 On SW1, create an Elan in this example, we create elan1SW1 # add elan SW2 # add elan SW1 # show lecsneighborinfo Configuring Lnni Distributed LES/BUS ServersSW2 # show elan On switch SW3, use the set lnniinfo to configure Lnni SW3 # start les LES SW1 # show lecsserverlistPage SmartSwitch 2500 Family Default Node ID Default Pnni AddressingSmartSwitch 6500 Family Default Node ID Pnni Routing SmartSwitch 6500 Default Node ATM Address SmartSwitch 2500 Family Default Node ATM Address MULTI-LEVEL Pnni Topology Connecting Multiple Peer Groups Change the tenth byte to SWA1 # set pnnipeergroupid Highest priority in election process Do the same for switch SWB3Specifies node number SWA3 # show pnnipglelection Do the same on switch SWB3SWB3 # set pnnipglelection Adding Higher-level Peer Groups Physical Connections Between Peer Groups Adding a third Pnni node for next level connectivity Managing Parallel Pnni Links SmartSwitch # show pnniinterface 7b2 Link on switch SWA2 comes from this port Perform the same operation on switch SWB2 in group B4a3 Link on switch SWB2 comes from this port Aggregation Tokens Aggregation token values and parallel links Pnni Link Timing SmartSwitch # set linkmonitortimeout Additional Routing Protocols RoutingIisp Routes This is an exterior route Iisp Routing Considerations Iisp Routing Example Two Iisp Routing Example One Iisp Link Timing Set linkmonitortimeout UNI Routes Take the default to make this an internal routeYes Advertise this address into the Pnni domain UNI Link Timing Creating Route Metrics Administrative WeightsRoute Metrics Enter show pnnimetric to view the newly created metric pair Create the outgoing member of the metric pairCreate the incoming member of the metric pair 6b2 IP Routing for ManagementIndex tag of our metric pair 90.1.1.254 Route NET Table To see the route, enter the show route command on SW2 Virtual Ports and Static Connections SmartSwitch # add trafficdescriptorPVC Connections Point-to-Point PVCs Specify first port Point-to-Multipoint PVCsSpecify its Vpci Specify its VCI Set PCRCLP01 to zero Take the default valuesPerform for ports 7a3 and 7a4 Connect the end node to port 7a1 of the ATM SmartSwitch Connecting to Local Switch Client Through a PVCUse add ipatmclient to create an IP over ATM local client Set client number Turn off Ilmi Turn off signalingPVP Connections 7b1 Use the show pvp command to display the PVP connectionSee note below Specify the first port 7a1.3, 5b2.3, A1.3, C5.3, and so on Connecting PVPsVirtual Ports Available VPIs = 2MaxVpiBits Creating Virtual Ports Default MaxVciBits = Default MaxVpiBits =Instance of set portconfig Set to 1 this translates to VPIs = 2 1-1 = VPIs used = Base VPI + 2 0 1 = 1 + 0 = .1 means our Base VPI is oneMaxVciBits decrements by Specify virtual port number and Base VPI Soft PVC and Soft PVP differences Things To Watch Out For When Creating Virtual PortsSoft PVC and PVP Connections Creating a soft PVC Making Soft PVC and PVP Connections SmartSwitch # show spvcaddress SmartSwitch # add spvcaddress6b3 Port on target switch 102 7a1 Port on source switch Creating a Soft PVP We use VPI= SmartSwitch # show spvp PortNumberALL Soft PVC and PVP Connections Traffic Descriptors Traffic ManagementTraffic Management Capabilities PeakCellRate CLP0+1 No Traffic DescriptorPeakCellRate CLP0+1, PeakCellRate CLP0 PeakCellRate CLP0+1, PeakCellRate CLP0, Tag CLP = Call Admission Control Policy Ubr SmartSwitch # set caceqbwallocschemeSmartSwitch # set cacserviceclassbw CPU UBR Queue Buffers MinIndex for 7a3Corresponds to CBR EFCI, EPD, and RM Cell Marking SmartSwitch # show switchtrafficcongestionSmartSwitch # set switchtrafficcongestion Traffic Management Capabilities Update Firmware Commands Firmware Upgrades and Bootline CommandsUnsuccessful Update IP address of Tftp server =df s Bootline CommandsEnter the go command to start the ATM SmartSwitch Accessing the Bootline Prompt Bootline Commands Explanations Swms Changes the slave TSM/CPU to the masterScsm =df b Upgrading Boot Load firmware Changing the Default Boot Load Image Upgrading Post Diagnostic firmware=chpi =df p Bootline CommandsFirmware Upgrades and Bootline Commands Upgrading Switch Operating firmware Start the ATM SmartSwitch by entering the go command Bootline Commands Port ATM Address Filters ATM Filtering and ClockingCreating ATM Address Filters How ATM Address Filters Work Source and Destination Address Masks ATM Address Filter Example FFFFFFFFFFFFFFFFFFFF00000000000000000000 Port Clock ConfigurationFilter Considerations Regarding Lane and IP over ATM Network Clocking Troubleshooting IP Over ATM Troubleshooting Troubleshooting LAN Emulation Switches in Different Peer Groups Troubleshooting Pnni LinksSwitches in Same Peer Group Diagnosing Congestion Troubleshooting CongestionGlobal Congestion Fewer than 100 connections on a port Min = 64, Max = Port Congestion Event Categories Events and Alarms SmartSwitch # set eventdisplay Viewing Events and Alarms SmartSwitch # set alarmdisplay Deleting Events and Alarms Password Login name on the serverSaving Core Dumps IP address of my Tftp server Saving Core Dumps MIB, SMI, MIB Files and Internet MIB Hierarchy Appendix a Agent Support MIB, SMI, MIB Files and Internet MIB Hierarchy CSI ZeitNet Proprietary MIBs Relation Between Object Identifier and the Represented Value CSI ZeitNet Proprietary MIB Groups Supported protocolsSupported SMI Formats Ctron Non-Conformance ATM SmartSwitch MIB SupportMIB Exceptions Not Supported Managing AN ATM SmartswitchConsole Commands that Affect the Agent Update firmware Backup Restore Reboot Default Community Strings Electronic Services FAX ServiceAppendix B Technical Support Telephone Assistance Repair Services Hardware WarrantySoftware Warranty Index Accessing the boot load prompt 12,4-4,4-6 Iisp routing considerations Fail-over timing Route type parameter Multi-level Pnni topology ZnSwitchDiscoveryTableZnPortTrafficCongTable PNN Enabling RM cell marking Changing EPD thresholds Vlan