Default Station Interface. August 24, 2010

Transcription

1 Default Station Interface V1 August 24, 2010

2 Bridge Baggy Pants Model Station EVB ontrolling Bridge HV SS MS -omp trl, EDP, VDP 6.9, EP S-omp ontrol & DP 9.5b 9.5b 9.5b S-omp ontrol & DP -omp trl, EDP, VDP EP 6.9, 6.20b 9.5b VEB/VEPA S-omp(Opt) S-omp(Opt) -omp A station uses a dual relay. The outside relay is an S-VLAN aware component. The inside relay is a VEB or VEPA. Stations also have an layer providing service to the Hypervisor and VMs. The S-omp relay is optional. When an S-channel is connected to a single a 2-port VEB is used which porvides -tag functions for the VM or hypervisor. An S-channel is implemented using the peered Port-mapping S-omps (803.1Qbc). An database exists on each exterior facing leg of the S-omp Each VEB, VEPA or 2-Port VEB has an database on it s exterior facing legs Each VEB VEPA or 2-Port VEB may have an database facing at the Bridge Port facing the VM. It also will filter all multicast addresses. 2 8/24/2010 EVB

3 The S-channel omponent Station HV SS MS VDP, EDP, -omp trl 6.9, EP S-omp ontrol & MDP Port-mapping S-VLAN component forms S-channels as Point-to-point S-VLANs 9.5b 9.5b VEB/VEPA S-omp(Opt) S-channels: 1)are pt-pt S-VLANs formed by Port-mapping S-VLAN components 2)begin and end at an S-channel Access Port (AP) 3)frames are always S-tagged in the channel and always un-s-tagged by the AP 4)Only a single ge Sc S-channel my terminate e (or begin) at a each AP 5)Multiple S-channels pass through the Station Bridge Access Port to the external LAN 3 8/24/2010 EVB

4 What is a VSI? Station Virtual NI Virtual Station Interface HV SS MS VDP, EDP, -omp trl 6.9, EP S-omp ontrol & MDP 9.5b 9.5b VEB/VEPA S-omp(Opt) A Virtual Station Interface (VSI) is an internal LAN which connects between a virtual NI and a Bridge Port of a VEB, VEPA, or 2-Port VEB. A VSI carries a single service instance. The term VSI is also used to reference a point where a Bridge Port of a VEB or VEPA attaches to a vni. vni Source and Sink for a single instance of service Includes functions: 4 8/24/2010 EVB 1) used to form the SAP for attaching the VM 2) address filter for an station ti and group addresses 4)VDP control 5)Management for VSI functions

5 What is the internal LAN on an S-channel? Station Internal LANs HV SS MS VDP, EDP, -omp trl 6.9, EP S-omp ontrol & MDP 95b 9.5b 95b 9.5b LANs VEB/VEPA S-omp(Opt) Two internal LANs 1)Internal LAN between the interior facing VLAN Bridge Ports or VEB/VEPA and the vni The where the internal LAN attaches is the Virtual Station Interface 2)Internal LAN between the APs and the exterior facing VLAN Bridge Ports of the VEB/VEPA This could be called the Default Station Interface (or DSI) DSI identifies the vswitch (VEB, VEPA, etc. attached) or attached application A DSI also exists for the default S-channel (no S-comp) A DSI can have addresses, VLAN assignments, and other application specific parts A DSI can have as many characteristics as a VM 5 8/24/2010 EVB

6 ase 1: No S-channels Station HV SS MS VDP, EDP, -omp trl 6.9, EP DSI VEB/VEPA S-omp(Opt) Default S-channel terminates on VEPA, VEB, 2-Port VEB, etc. Same characteristics as the normal S-channel case Though no internal LAN we still have the reference point 6 8/24/2010 EVB

7 ase 2: S-channels enabled Station HV SS VDP, EDP, -omp trl EP MS 6.9, S-omp ontrol & MDP 95b 9.5b 95b 9.5b DSI VEB/VEPA S-omp(Opt) S-channel terminates at a VEB, VEPA, 2-Port EVB, etc DSI may have and VLAN for management access 7 8/24/2010 EVB

8 Databases - Station Sublayer Service Interfaces -SS EP-SS /-SS /-SS AP(VM/Hypervisor) Internal LANs/s (VSIs) VEB/VEPA/2-Port VEB Optional Port-mappring S-VLAN omp Bridge-Y/ Optional Bridge-Y/ EP VDP Optional Internal LANs/s EDP Opt. DP DSI TLV added to Nearest ustomer DBs Default S-channel uses N-DB as only database TLV same as VDP ASSO/RP TLV, in format TLV sent by Station with a Bridge response Hypervisor ontrol Interface Nearest ustomer Remote DB Nearest non-tpmr Remote DB Note: When only a default S-channel exists then only single NDB? Nearest ustomer Local DB Nearest non-tpmr Local DB Present only if Port-mapping S-VLAN omp present for S-channel support 8 8/24/2010 EVB

9 The image cannot be displayed. Your computer may not have enough memory to open the image, or the image may have been corrupted. Restart your computer, and then open the file again. If the red x still appears, you may have to delete the image and then insert it again. DSI TLV For Database Octets: TLV type = TLV information OUI Subtype 127 string length (3 octets) (1 octet) (7 bits) (9 bits) Mode (2 octet) M VSI VSI VSI Type VSI /VLAN /VLANs Mgr ID Type ID Version Instance ID Format (M octets) (1 octet) (3 octets) (1 octets) (16 octets) (1 octets) Bits: TLV header VSI Type and Instance VSI Attributes TLV information string = 28+ M octets & VLAN Info Station sets mode field = ASSO + SUS Bridge sets TLV to UNASSO until it sees station s ti DSI TLV On seeing station s TLV Bridge either successfully associates echoing the station TLV On seeing station s TLV Bridge rejects the association by echoing the station TLV with a FAIL condition code in mode2. 9 8/24/2010 EVB

10 Basic Success Scenario Station 2 Associate TLV Associate + Success TLV Bridge 3 Basic Fail Scenario Station 2 Associate TLV Associate + Fail TLV Bridge 3 Bridge does not put a DSI TLV in it s database until it sees a TLV from the Station. The Bridge TLV is either an echo of the Station TLV with a SUS response code or with a FAIL response code. The Bridge rejects the association by echoing a fail response code. The only time the Bridge does not respond is when it does not process DSI TLV 10 8/24/2010 EVB

11 DSI Summary Each S-channel (including the default S-channel) has a Default Station ti Interface This interface typically attaches to a vswitch The characteristic of the communication path are profiled with the DSI The DSI is created by an exchange of DSI TLVs in the N-DB 11 8/24/2010 EVB

12 BAKUP SLID 12 8/24/2010 EVB

13 Startup-No Sch LAN (Default S-hannel) PF ETS EDP (Default S-hannel)? Default ASSO TLV? EP VDP Transition between No Sch and Shf Sch facilitated by default S- channel (the un-s-tagged set). Startup-Sch LAN (with S-hannels) PF ETS EDP (Default S-hannel)? Default ASSO TLV? DP EP (Default S-hannel) VDP (Default S-hannel) Per hannel EDP Default ASSO TLV EP VDP 13 8/24/2010 EVB

14 EVB Overview VM Edge Virtual Station Interfaces Bridge Edge S-channel Provides the ability to support VEBs, VEPAs, and individual VMs on a single LAN. VM VM VM VM VM VM VM VLAN Bridge Ports VEB VEB VEPA Hypervisor S- omponent S-ompone entl - omponentl S-channel Access Port (AP) L2 net(s) () VLAN Bridge Ports Server Edge Network Edge Virtual NI (vni) the entity used to implement the End Station functions of the attachment point. The vni sources one or more instances of service Virtual Station Interface(VSI) is an internal LAN which connects between a virtual NI and a Bridge Port of a VEB or VEPA. A VSI sources a single instance of service. The term VSI is also used to reference a point where a Bridge Port of a VEB or VEPA attaches to a vni. Virtual t l Ethernet t Bridges (VEB): a specialized 802.1Q bridge within the station ti used for bridging i between multiple l virtual stations ti interfaces and an external network Virtual Ethernet Port Aggregator (VEPA): a entity within a end station that knows the addresses for each VSI and operates in conjunction with reflective relay in an adjacent bridge to provide bridging between multiple virtual stations interfaces and an external network S-channel is a Point-to-point S-VLANs which spans over Port-mapping S-VLAN components(802.1qbc) or M-components(802.1Qbh) and between S-channel Access Port (AP). Only a single S-channel on a particular AP S-channel Access Port (AP) is the name for the un-s-tagging Bridge Port (Provider Access Port of a Port-mapping S-VLAN component (802.1Qbc)) that terminates an S-channel 14 8/24/2010 EVB

15 Address hoices for The Port-mapping S-VLAN component used to implement S- channels is a conformant S-omp and therefore we use Nearest non-tpmr bridge address ( ) ) for at DP. The second database is at an SAP of the /VEB/VEPA. Both of these are addresses by the Nearest ustomer Address: If we don t have an S-omp then (see clause 7.4) we only send and receive on the nearest customer bridge address we discard any nearest non-tpmr bridge addressed frames we discard any nearest bridge addressed frames If we have both S-omp and /VEB/VEPA then we send on both nearest customer bridge and nearest non-tpmr bridge we discard any nearest bridge addressed frames 15 8/24/2010 EVB

16 S-channel omponents VEB/ VEPA VEB/ VEPA EVB Station S-channel Access Ports (AP) S-channel LAN S Port- mapping S-VLAN comp Port- mapping S-VLAN comp Station- Bridge Access Port (SBAP) S-channel Access Ports (AP) EVB Bridge -omp AP and SBAP are same definitions as PAP and RAP S-TAG remains unchanged and with same name S-channel is a point-to-point S-VLAN terminating at a AP 16 8/24/2010 EVB

17 ascade of Port-mapping S-VLAN omps EVB Station Portmapping S-VLAN comp S EVB Station S LAN S LAN S B B M- omp S LAN S EVB ontrolling Bridge Portmapping S-VLAN comp Portmapping S-VLAN comp B from S-B hop-by-hop through cascade. 17 8/24/2010 EVB