8.3.17.0 - Force10 Networks

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www.dell.com | support.dell.com Configuration Source Election When an auto-upstream or auto-downstream port receives a DCB configuration from a peer, the port first checks to see if there is an active configuration source on the switch. • If a configuration source already exists, the received peer configuration is checked against the local port configuration. If the received configuration is compatible, the DCBX marks the port as DCBX-enabled. If the configuration received from the peer is not compatible, a warning message is logged and the DCBX frame error counter is incremented. Although DCBX is operationally disabled, the port keeps the peer link up and continues to exchange DCBX packets. If a compatible peer configuration is later received, DCBX is enabled on the port. • If there is no configuration source, a port may elect itself as the configuration source. A port may become the configuration source if the following conditions exist: • No other port is the configuration source. • The port role is auto-upstream. • The port is enabled with link up and DCBX enabled. • The port has performed a DCBX exchange with a DCBX peer. • The switch is capable of supporting the received DCB configuration values through either a symmetric or asymmetric parameter exchange. A newly elected configuration source propagates configuration changes received from a peer to the other auto-configuration ports. Ports receiving auto-configuration information from the configuration source ignore their current settings and use the configuration source information. Propagation of DCB Information When an auto-upstream or auto-downstream port receives a DCB configuration from a peer, the port acts as a DCBX client and checks if a DCBX configuration source exists on the switch. • If a configuration source is found, the received configuration is checked against the currently configured values that are internally propagated by the configuration source. If the local configuration is compatible with the received configuration, the port is enabled for DCBX operation and synchronization. • If the configuration received from the peer is not compatible with the internally propagated configuration used by the configuration source, the port is disabled as a client for DCBX operation and synchronization and a syslog error message is generated. The port keeps the peer link up and continues to exchange DCBX packets. If a compatible configuration is later received from the peer, the port is enabled for DCBX operation. Note: When a configuration source is elected, all auto-upstream ports other than the configuration source are marked as willing disabled. The internally propagated DCB configuration is refreshed on all auto-configuration ports and each port may begin configuration negotiation with a DCBX peer again. 64 | Data Center Bridging (DCB)
Auto-Detection of the DCBX Version The Aggregator operates in auto-detection mode so that a DCBX port automatically detects the DCBX version on a peer port. Legacy CIN and CEE versions are supported in addition to the standard IEEE version 2.5 DCBX. A DCBX port detects a peer version after receiving a valid frame for that version. The local DCBX port reconfigures to operate with the peer version and maintains the peer version on the link until one of the following conditions occurs: • The switch reboots. • The link is reset (goes down and up). • The peer times out. • Multiple peers are detected on the link. DCBX operations on a port are performed according to the auto-configured DCBX version, including fast and slow transmit timers and message formats. If a DCBX frame with a different version is received, a syslog message is generated and the peer version is recorded in the peer status table. If the frame cannot be processed, it is discarded and the discard counter is incremented. DCBX Example Figure 6-4 shows how DCBX is used on an Aggregator installed in a PowerEdge M1000e chassis in which servers are also installed. • The external 40GbE ports on the base module (ports 33 and 37) of two switches are used for uplinks configured as DCBX auto-upstream ports. The Aggregator is connected to third-party, top-of-rack (ToR) switches through 40GbE uplinks. The ToR switches are part of a Fibre Channel storage network. • The internal ports (ports 1-32) connected to the 10GbE backplane are configured as auto-downstream ports. • On the Aggregator, PFC and ETS use DCBX to exchange link-level configuration with DCBX peer devices. Data Center Bridging (DCB) | 65
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Dell PowerEdge Configuration Guide
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October 2012 | iii
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1 About this Guide . . . . . . . .
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Data Center Bridging Exchange Proto
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Displaying VLAN Membership . . . .
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Read Managed Object Values . . . .
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Troubleshooting Packet Loss . . . .
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About this Guide Objectives 1 This
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Before You Start Default Settings 2
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DCB Support DCB enhancements for da
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The untagged VLAN of a server-facin
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Configuration Fundamentals 3 The De
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Navigating CLI Modes The FTOS promp
Page 27 and 28: Figure 3-5. Undoing a command with
Page 29 and 30: Table 3-2. Short-Cut Keys and their
Page 31 and 32: Multiple Users in Configuration Mod
Page 33 and 34: Getting Started This chapter contai
Page 35 and 36: Uplink Ports Ports 33 to 56 are ext
Page 37 and 38: Step Task (continued) Note: Termina
Page 39 and 40: Figure 4-4. Completed Boot Process
Page 41 and 42: Figure 4-6. Completed Boot Process
Page 43 and 44: Access the Aggregator Remotely Conf
Page 45 and 46: Dell Force10 recommends using the e
Page 47 and 48: Figure 4-10 shows an example of usi
Page 49 and 50: To view the contents of a file, fol
Page 51 and 52: Figure 4-14. Alternative Storage Lo
Page 53 and 54: Aggregator Management This chapter
Page 55 and 56: Changing System Logging Settings Yo
Page 57 and 58: Configuring a UNIX Logging Facility
Page 59 and 60: Enabling the FTP Server To enable t
Page 61 and 62: Recovering from a Forgotten Passwor
Page 63 and 64: Figure 5-5. Recovering from a Faile
Page 65 and 66: Data Center Bridging (DCB) 6 On an
Page 67 and 68: Figure 6-1. Priority-Based Flow Con
Page 69 and 70: Data Center Bridging Exchange Proto
Page 71 and 72: QoS dot1p Traffic Classification an
Page 73 and 74: How Enhanced Transmission Selection
Page 75 and 76: DCB Policies in a Switch Stack A DC
Page 77: Note: On a DCBX port, application p
Page 81 and 82: DCBX Error Messages An error in DCB
Page 83 and 84: Figure 6-7. show interfaces pfc sum
Page 85 and 86: Table 6-3. show interface pfc summa
Page 87 and 88: Table 6-4. show interface ets detai
Page 89 and 90: Figure 6-12. show interface dcbx de
Page 91 and 92: Example: PFC and ETS Operation This
Page 93 and 94: Table 6-8. Example: priority group-
Page 95 and 96: Skippy812 Dynamic Host Configuratio
Page 97 and 98: Assigning an IP Address Using DHCP
Page 99 and 100: Releasing and Renewing DHCP-based I
Page 101 and 102: Figure 7-5. DHCP Client: Debug Mess
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Page 105 and 106: FIP Snooping 8 FIP snooping is auto
Page 107 and 108: Figure 8-1. FIP discovery and login
Page 109 and 110: The following sections describe how
Page 111 and 112: FIP Snooping Prerequisites On an Ag
Page 113 and 114: Figure 8-3. show fip-snooping sessi
Page 115 and 116: Figure 8-7. show fip-snooping stati
Page 117 and 118: Table 8-5. show fip-snooping statis
Page 119 and 120: FIP Snooping Example Figure 8-11 sh
Page 121 and 122: Internet Group Management Protocol
Page 123 and 124: IGMP Version 3 Conceptually, IGMP v
Page 125 and 126: Leaving and Staying in Groups Figur
Page 127 and 128: Figure 9-6. show ip igmp groups Com
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Interfaces 10 This chapter describe
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Viewing Interface Information You c
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Disabling and Re-enabling a Physica
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The Aggregator supports the managem
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Configuring a Static Route for a Ma
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Port-Based VLANs Port-based VLANs a
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Displaying VLAN Membership To view
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Adding an Interface to an Untagged
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Port channels can contain a mix of
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Figure 10-12. show interface port-c
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Create a Multiple-Range Figure 10-1
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Maintenance Using TDR The time doma
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MTU Size The Aggregator auto-config
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Figure 10-19. show interfaces statu
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Figure 10-21 shows the auto-negotia
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Clearing Interface Counters The cou
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iSCSI Optimization 11 An Aggregator
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If no iSCSI traffic is detected for
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Displaying iSCSI Optimization Infor
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Link Aggregation The Aggregator aut
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LACP Example Figure 12-1 shows an e
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Figure 12-3. show lacp 128 Command
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Figure 12-5. show interfaces port-c
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Layer 2 The Aggregator supports CLI
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Figure 13-1. Redundant NICs with NI
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Link Layer Discovery Protocol (LLDP
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Organizationally Specific TLVs Orga
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TIA Organizationally Specific TLVs
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LLDP-MED Network Policies TLV A net
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LLDP Operation On an Aggregator, LL
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Figure 14-10. Viewing All Informati
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Debugging LLDP The debug lldp comma
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Table 14-8. LLDP System MIB Objects
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Table 14-10. LLDP-MED System MIB Ob
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Port Monitoring 15 The Aggregator s
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Figure 15-2 shows ports 0/25 and 0/
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In Figure 15-4, the host and server
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16 Simple Network Management Protoc
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Dell Force10 supports RFC 4001, Tex
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Figure 16-6 shows the output for an
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Use dot3aCurAggFdbTable to fetch th
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Monitor Port-channels To check the
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The status of the MIBS is as follow
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Stacking Overview 17 An Aggregator
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Stack Master Election The stack ele
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Stacking Port Numbers By default, e
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Cabling Procedure The following cab
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Resetting a Unit on a Stack Use the
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Figure 17-19. show system Command E
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Troubleshooting a Switch Stack Trou
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Figure 17-27. show hardware stack-u
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Stack Unit in Card-Problem State Du
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Upgrading a Single Stack Unit Upgra
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Broadcast Storm Control 18 On the A
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System Time and Date 19 The Aggrega
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Setting the Time Zone Universal tim
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Setting Recurring Daylight Saving T
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Uplink Failure Detection (UFD) Upli
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Figure 20-2. Uplink Failure Detecti
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Show Command Syntax Description sho
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Debugging UFD on an Interface To en
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Upgrade Procedures 21 To view the r
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Debugging and Diagnostics The chapt
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Broadcast, unknown multicast, and D
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Auto-configured VLANs do not exist
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Figure 22-2. show system stack-unit
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Figure 22-3. Taking a Stack Unit Of
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Table 22-2. show hardware Commands
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Recognize an Over-Temperature Condi
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The simple network management proto
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Deciding to Tune Buffers Dell Force
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Figure 22-11. Displaying Buffer Pro
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Sample Buffer Profile Configuration
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Figure 22-14. Displaying Buffer Sta
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Displaying Stack Port Statistics Th
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Figure 22-19. Mini application core
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Standards Compliance This chapter c
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General IPv4 Protocols RFC# Full Na
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Network Management (continued) RFC#
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