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Scalable midsize data center designs
1.
2.
Scalable Midsize Data
Center Designs BRKDCT-2218 Jerry Hency, Technical Marketing Engineer
3.
“Scalable Midsize Data
Center Designs” So what exactly do we mean? SCALABLE: – – Right-sizing the Data Center, not just large scale. Using components that will also transition easily into larger designs. MIDSIZE: – – – – Requiring a dedicated pair of DC switches. The transition point upwards from collapsed-core. Separate Layer 2/3 boundary, with DC-oriented feature set. Layer-2 edge switching for virtualization. Client Access/Enterpr ise WAN/Internet Edge L3 ----------L2 Data Center DATA CENTER DESIGNS: – – Topology options from single to dual-tier data centers. Tradeoffs of components to fill topology roles. BRKDCT-2218 © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 3
4.
Session Agenda Midsize
Data Center Requirements – Goals and Challenges – Fabric Requirements Starting Point: The Access Pod – Compute and Storage Edge Requirements – Key Features Single Pod Design Examples – Nexus 5500, 6000, 7000-based – vPC Best Practices Moving to a Multi-Tier Fabric – Spine/Leaf Designs – Best Practices with FabricPath BRKDCT-2218 © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 4
5.
Midsize Data Center
Goals and Challenges Provide example designs which: Allow growing organizations to take advantage of the same Nexus Data Center features and innovations as larger organizations. Balance cost with port density, software features, and hardware capabilities. Allow rapid growth of the network as needs change reuse of components in new roles. Provide ease of implementation and operational simplicity for organizations managing a growing network with a small staff. Choose features to prioritize when making design choices: Leaf/Access Features: Robust FEX options, Enhanced vPC, 10GBASE-T support, Unified Ports (Native Fibre Channel), FCoE, Adapter-FEX, VM-FEX Spine/Aggregation Features: 40 Gig-E, Routing Scale, OTV, MPLS, HA, VDC’s BRKDCT-2218 © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 5
6.
Growth with Investment
protection Re-Use of key components as the design scales Single layer expands to dual-tier with additional switch pair to form aggregation/access design Scalable Spine/Leaf DC Fabric Dual Tier DC Single Layer DC Models Easily scale the fabric by adding switches Add Spine switches to scale fabric bandwidth Add Leaf switches to scale edge port density BRKDCT-2218 © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 6
7.
Server Edge Requirements
Drive Design Choices Virtualization Requirements Form Factor – Unified Computing Fabric – 3rd Party Blade Servers – Rack Servers (Non-UCSM) Storage Protocols – vSwitch/DVS – Nexus 1000v – VM-FEX HW Switching NIC Connectivity Model – 10 or 1-GigE Server ports – Physical Interfaces per server – NIC Teaming models – Fibre Channel – FCoE – iSCSI, NAS FC iSCSI NFS/ CIFS FCoE VM VM VM BRKDCT-2218 © 2013 Cisco and/or its affiliates. All rights reserved. VM VM VM Cisco Public 7
8.
Communications Fabric Requirements
Varied “North-South” communication needs with users and external entities. Flexibility to support multiple protocols and connectivity types. High Throughput and low latency requirements. Cloud Site B Offsite DC DATA CENTER FABRIC FC FCoE iSCSI / NAS Data Storage Services Increasing availability requirements. BRKDCT-2218 Enterprise Network Mobile NORTH - SOUTH TRAFFIC Increasing “East-West” communication needs: clustered applications and workload mobility. Internet Server/Compute EAST – WEST TRAFFIC © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 8
9.
Session Agenda Midsize
Data Center Requirements – Goals and Challenges – Fabric Requirements Starting Point: The Access Pod – Compute and Storage Edge Requirements – Key Features Single Pod Design Examples – Nexus 5500, 6000, 7000-based – vPC Best Practices Moving to a Multi-Tier Fabric – Spine/Leaf Designs – Best Practices with FabricPath BRKDCT-2218 © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 9
10.
Access Pod basics:
Compute, Storage, and Network “Different Drawing, Same Components” To Data Center Aggregation or Network Core Access/Leaf Switch Pair UCS Fabric Interconnect System Storage Array BRKDCT-2218 © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 10
11.
Access Pod Features:
Virtual Port Channel (vPC) Port-Channels allow aggregation of multiple physical links into a logical bundle. vPC allows Port-channel link aggregation to span two separate physical switches. With vPC, Spanning Tree Protocol is no longer the primary means of loop prevention Physical Topology Logical Topology Virtual Port Channel Provides more efficient bandwidth utilization since all links are actively forwarding L2 Si Si vPC maintains independent control and management planes Two peer vPC switches are joined together to form a “domain” BRKDCT-2218 © 2013 Cisco and/or its affiliates. All rights reserved. Non-vPC Cisco Public vPC 11
12.
Access Pod Features:
Nexus 2000 Fabric Extension Using FEX provides Top-of-Rack presence in more racks with reduced points of management, less cabling, and lower cost. In a “straight-through” FEX configuration, each Nexus 2000 FEX is only connected to one parent switch. End/Middle of Row Switching with FEX Supported straight-through FEX parent switch is Nexus 7000, 6000 or 5000 Series. Nexus Parent Switch The same Fabric Extension technology is used between UCS FI and I/O Modules in blade chassis. Nexus 2000 FEX See current platform FEX scale numbers on cisco.com under configuration guides. BRKDCT-2218 © 2013 Cisco and/or its affiliates. All rights reserved. Dual NIC Active/Standby Server Cisco Public Dual NIC 802.3ad Server 12
13.
Access Pod Features:
Enhanced vPC (EvPC) In an Enhanced vPC configuration any server NIC teaming configuration will be supported on any port. No ‘orphan ports’ in the design. All components in the network path are fully redundant. Nexus Parent Switch Every port has a physical path to both parent switches Nexus 2000 FEX Supported dual-homed FEX parent switch is Nexus 6000 or 5500. Provides flexibility to mix all three server NIC configurations (single NIC, Active/Standby and NIC Port Channel). Single NIC Dual NIC Active/Standby Dual NIC 802.3ad Note, Port Channel to active/active server is standard port channel, not configured as “vPC”. BRKDCT-2218 © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 13
14.
Access Pod Features:
Unified Ports and FCoE Any Unified Port can be configured as: Unified Port allows a physical port to be configured to support either native Fibre Channel or Ethernet. Fibre Channel Traffic SFP+ optic needs to be chosen to support the setting of the port Fibre Channel over Ethernet (FCoE) allows encapsulation and transport of Fibre Channel traffic over a shared Ethernet network Traffic may be extended over MultiHop FCoE, or directed to an FC SAN or Nexus 5500 Ethernet/FC Switches SAN-B SAN-A FC Fibre Channel Disk Array FEX SAN “A” / “B” isolation is maintained across the network BRKDCT-2218 Fibre Channel Fibre Channel Traffic Ethernet © 2013 Cisco and/or its affiliates. All rights reserved. FCoE Links Servers with CNA Cisco Public 14
15.
Planning Physical Data
Center Pod Requirements Plan for growth in a modular, podbased repeatable fashion. Your own “pod” definition may be based on compute, network, or storage requirements. (2) N5548UP PATCH Storage Arrays How many current servers/racks and what is the expected growth? Map physical Data Center needs to a flexible communication topology. Nexus switching at Middle or End of Row will aggregate multiple racks of servers with FEX. BRKDCT-2218 (2)N2232 FEX Term Svr, Mgt Switch Today’s Server Racks Network/Storage Rack (32) 1RU Rack Servers Compute Rack Tomorrow’s Data Center Floor © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 15
16.
Data Center Service
Integration Approaches Data Center Service Insertion Needs Firewall, Intrusion Prevention Application Delivery, Server Load Balancing Network Analysis, WAN Optimization Physical Service Appliances Typically introduced at Layer 2/3 Boundary or Data Center edge. Traffic direction with VLAN provisioning, Policy-Based Routing, WCCP. Use PortChannel connections to vPC. Static Routed through vPC, or transparent. Network Core Physical DC Service Appliances (Firewall, ADC/SLB, etc.) Virtualized Services Deployed in a distributed manner along with virtual machines. Traffic direction with vPath and Nexus 1000v. BRKDCT-2218 © 2013 Cisco and/or its affiliates. All rights reserved. Virtual DC Services in Software L3 ----------L2 VM VM VM VM VM VM Virtualized Servers with Nexus 1000v and vPath Cisco Public 16
17.
Session Agenda Midsize
Data Center Requirements – Goals and Challenges – Fabric Requirements Starting Point: The Access Pod – Compute and Storage Edge Requirements – Key Features Single Pod Design Examples – Nexus 5500, 6000, 7000-based – vPC Best Practices Moving to a Multi-Tier Fabric – Spine/Leaf Designs – Best Practices with FabricPath BRKDCT-2218 © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 17
18.
Single Layer Data
Center, Nexus 5500 Dedicated Nexus 5548-based DC switch pair (or 5596 for higher port count) Client Access • Unified Ports support native Fibre Channel, FCoE, iSCSI or NAS Storage. WAN / DCI Campus • Non-blocking, line-rate 10Gpbs Layer-2 switching with low latency. • Up to 160Gbps Layer-3 switching capacity with L3 daughter card. L3 ----------L2 Nexus 5548 • Nexus 5500 supports physical FEX, Adapter-FEX, VM-FEX capabilities. FC FCoE iSCSI / NAS Notes: OTV/LISP DCI services may be provisioned on separate Nexus 7000 or ASR 1000 WAN Routers ISSU not supported with Layer-3 module in 5500 switches BRKDCT-2218 © 2013 Cisco and/or its affiliates. All rights reserved. 10-GigE UCS C-Series 1Gig/100M Servers Nexus 2000 10 or 1-Gig attached UCS C-Series Cisco Public 18
19.
Single Layer Data
Center, Nexus 6001 Dedicated Nexus 6001-based Data Center switch pair Client Access Nexus 6001 benefits: WAN / DCI Integrated line-rate layer-3 Native 40-Gig capability Low ~1us switch latency at Layer-2/3 Up to 16 full-rate SPAN sessions Greater 10GigE port density (at 1-RU) Campus L3 ----------L2 Nexus 6001 Example Design Components: 2 x Nexus 6001, Layer-3 and Storage Licenses 4 x Nexus 2232PP/TM-E (10-GigE FEX) 2 x Nexus 2248TP-E (1-GigE FEX) Note: Native Fibre Channel storage support would require separate Nexus 5500 or MDS SAN BRKDCT-2218 © 2013 Cisco and/or its affiliates. All rights reserved. FCoE iSCSI / NAS 10-GigE UCS C-Series 1Gig/100M Servers Nexus 2000 10 or 1-Gig attached UCS C-Series Cisco Public 19
20.
Single Layer Data
Center plus UCS Fabric Alternate Server Edge 1: UCS Fabric Interconnects with Blade and Rack Servers • Typically 4 – 8 UCS Chassis per Fabric Interconnect pair. Maximum is 20. Client Access WAN / DCI Campus • UCSM can also manage C-Series servers through 2232PP FEX to UCS Fabric. • Dedicated FCoE uplinks from UCS FI to the Nexus 6001 for FCoE SAN Access • Nexus switching layer provides inter-VLAN routing, upstream connectivity, and storage fabric services. L3 ----------L2 Nexus 6001 FCoE iSCSI / NAS UCS Fabric Interconnects • Example DC Switching Components: 2 x Nexus 6001 Layer- 3 and Storage Licensing 2 x Nexus 2232PP/TM-E BRKDCT-2218 © 2013 Cisco and/or its affiliates. All rights reserved. Nexus 2000 UCS B-Series Chassis Cisco Public UCSM managed C-Series 20
21.
Single Layer Data
Center plus B22 FEX Alternate Server Edge 2: HP, Dell, or Fujitsu Blades Example with B22 FEX Client Access • B22 FEX allows Fabric Extension directly into compatible 3rd-party chassis. WAN / DCI Campus • Provides consistent network topology for multiple 3rd-party blade systems and nonUCSM rack servers. • FCoE-based storage, or Nexus 5500/MDS SAN connected to server HBA’s L3 ----------L2 Nexus 6001 FCoE iSCSI / NAS • Example Components: 2 x Nexus 6001 L3 and Storage Licensing 4 x Nexus B22 • Server totals vary based on optional use of additional FEX. BRKDCT-2218 © 2013 Cisco and/or its affiliates. All rights reserved. UCS C-Series Cisco B22 FEX for Blade Chassis Access Cisco Public 21
22.
Flexible Design with
Access Pod Variants Mix and match Layer-2 compute connectivity for migration or scale requirements Nexus switching and FEX provide operational consistency UCS Managed Blade and Rack Rack Server Access with FEX B22 FEX with 3rd Party Blade Servers 3rd Party Blades with PassThru and FEX More features, highest value and physical consolidation BRKDCT-2218 © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 22
23.
Single Layer Data
Center, Nexus 6004 Positioned for rapid scalability and a 40-GigE Fabric Client Access Nexus 6004 Benefits: Includes 48 40-GigE QSFP or 192 10-GigE ports, up to 96 40-GigE or 384 10-GigE Integrated line-rate layer-3 Native 40-Gig switch fabric capability Low ~1us switch latency at Layer-2/3 Line-rate SPAN at 10/40 GigE WAN / DCI Campus L3 ----------L2 Nexus 6004 Example Components: 2 x Nexus 6004, 24 40G or 96 10G ports active L3 and Storage Licensing 8 x Nexus 2232PP/TM-E Note: FCoE, iSCSI, NAS storage are supported at release, 6004 native FC module on the roadmap. BRKDCT-2218 © 2013 Cisco and/or its affiliates. All rights reserved. FCoE iSCSI / NAS 10 or 1-Gig attached UCS C-Series Cisco Public 23
24.
Single Layer Data
Center, Nexus 7004 Highly Available Virtualized Chassis Access/Aggregation Model Benefits of Nexus 7004 with F2 I/O Modules: Supervisor High Availability Layer-2/3 ISSU Virtual Device Contexts (VDC) PBR, WCCP for service integration FabricPath support for future expansion Client Access WAN / DCI Campus L3 ----------L2 Nexus 7004 Example Components: 2 x Nexus 7004, dual SUP-2/2e Dual F248XP or XT (96x10G per chassis) Layer-3 Licensing 4 x Nexus 2232PP iSCSI / NAS 10 or 1-Gig attached UCS C-Series Note: For native Fibre Channel or FCoE add Nexus 5500 access layer or MDS SAN. BRKDCT-2218 © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 24
25.
Configuration Best Practices
Summary: vPC with Layer-2, Layer-3
26.
Virtual Port Channel
and Layer-2 Optimizations What features to enable? • Autorecovery: Enables a single vPC peer to bring up port channels after power outage scenarios vPC Domain: • autorecovery • vpc peer switch • Orphan Port Suspend: Allows non-vPC ports to fate-share with vPC, enables consistent behavior for Active/Standby NIC Teaming • vPC Peer Switch: Allows vPC peers to behave as a single STP Bridge ID (not required with vPC+ • Unidirectional Link Detection (UDLD): Best practice for fiber port connectivity to prevent one-way communication (use “normal” mode) BRKDCT-2218 © 2013 Cisco and/or its affiliates. All rights reserved. Identify Orphan Ports for Active/Standby Teaming Dual NIC 802.3ad Dual NIC Active/Standby Cisco Public 26
27.
Virtual Port Channel
and Layer-3 Optimizations What features to enable? • • vPC Domain: • Peer gateway • ip arp sync vPC and HSRP: Keep HSRP timers at defaults, vPC enables active/active HSRP forwarding vPC Peer Gateway: Allows the peers to respond to the HSRP MAC, as well as the physical MAC’s of both peers. • Layer-3 Peering IP ARP Synchronize: Proactively synchronizes the ARP table between vPC Peers over Cisco Fabric Services (CFS) L3 ----------L2 vPC Domain • Layer-3 Peering VLAN: Keep a single VLAN for IGP peering between N5k/6k vPC peers on the peer link. (On N7k can also use a separate physical link) • Bind-VRF: Required on Nexus 5500, 6000 for multicast forwarding in a vPC environment. (Not required if using vPC+ with FabricPath) BRKDCT-2218 © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 27
28.
Session Agenda Midsize
Data Center Requirements – Goals and Challenges – Fabric Requirements Starting Point: The Access Pod – Compute and Storage Edge Requirements – Key Features Single Pod Design Examples – Nexus 5500, 6000, 7000-based – vPC Best Practices Moving to a Multi-Tier Fabric – Spine/Leaf Designs – Best Practices with FabricPath BRKDCT-2218 © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 28
29.
Migration from single
to dual-layer switching Moving from single to dual-layer models: • Larger switches (Nexus 7000, 6004) more suited to becoming spine/aggregation. L3 ----------L2 Nexus 7004 or 6004 Single Layer • Smaller switches (Nexus 5500, 6001) more suited to becoming leaf/access. • Starting with larger switches eliminates need to move SVI’s (Layer-3 gateway.) • Aggregation switches can support access switch connections, FEX, and directattached servers during migration. BRKDCT-2218 Nexus 5500 or 6001 Single Layer © 2013 Cisco and/or its affiliates. All rights reserved. Nexus 7004 or 6004 Spine plus 6001 or 5500 Leaf, Dual Layer DC Cisco Public 29
30.
Oversubscription: Balancing Cost
and Performance Oversubscription: Most servers will not be consistently filling a 10 GigE interface. A switch may be line-rate non-blocking, but still introduce oversubscription into an overall topology by design. Consider Ethernet-based storage traffic when planning ratios, don’t be overly aggressive. Example device-oriented numbers with all ports active: Nexus 6001: 48x10Gig + 4x40Gig uplink, 48:16 or 3:1 topology-level oversubscription. Nexus 2232PP FEX: 32x10Gig + 8x10Gig uplink, 32:8 or 4:1 topology-level oversubscription. Actual oversubscription can be controlled by how many ports and uplinks are physically connected. BRKDCT-2218 © 2013 Cisco and/or its affiliates. All rights reserved. 3:1 4:1 Cisco Public 30
31.
Working with 40
Gigabit Ethernet Nexus 6000 and 7000 support QSFP-based 40 Gigabit Ethernet interfaces.* Nexus 6004 at FCS provides QSFP ports only, but splitter cables can be used to provision 4x10GigE ports out of 1 QSFP QSFP-40G-CR4 direct-attach cables 40 Gigabit Ethernet cable types: • Direct-attach copper [QSFP <-> QSFP] and [QSFP <-> 4 x SFP+]. Passive cables at 1/3/5m, active cables at 7 and 10m. • SR4 uses bit-spray over 4 fiber pairs within a 12 fiber MPO/MTP connector to reach up to 100/150m on multimode OM3/OM4 • CSR4 is a higher powered SR4 optic with reach up to 300/400m on multimode OM3/OM4 • LR4 uses CWDM to reach up to 10km on a single-mode fiber pair. * Verify platform-specific support of specific optics/distances BRKDCT-2218 © 2013 Cisco and/or its affiliates. All rights reserved. QSFP+ to 4-SFP+ direct-attach cables (splitter) QSFP-40G-SR4 with direct MPO and 4x10 MPO-to-LC duplex splitter fiber cables Cisco Public 31
32.
Value of FabricPath/vPC+
in Spine/Leaf Designs Using FabricPath with a traditional DC Topology Aggregation becomes Spine Access becomes Leaf FabricPath Benefits: Ease of configuration Completely eliminates STP from running between Leaf and Spine No Orphan Port isolation on Access (Leaf) switch vPC Peer-link loss Improved Multicast support, no “bind-vrf” needed (N5500/6000), also adds PIM-SSM capability Greater flexibility for future growth and change in the topology BRKDCT-2218 © 2013 Cisco and/or its affiliates. All rights reserved. Spine FabricPath Leaf vPC+ FEX VM VM VM UCS Rack Servers Cisco Public 32
33.
Dual Layer Nexus
6000 Data Center 40-GigE Optimized low-latency switch fabric Data Center switching control plane distributed over Dual Layers. Aggregation (Spine): Layer-3 and services boundary, scale point to expand fabric. Access (Leaf): Physical TOR or FEX aggregation point, Layer-2 virtualization services. WAN / DCI L3 ----------L2 Nexus 6004 Spine FCoE iSCSI / NAS Multi-hop FCoE with dedicated links. Nexus 6001 Leaf Example Components: 2 x Nexus 6004, 2 x Nexus 6001 Layer-3 and Storage Licensing 12 x Nexus 2232PP/TM-E Enable FabricPath between tiers for configuration simplicity and future scale. BRKDCT-2218 © 2013 Cisco and/or its affiliates. All rights reserved. 10 or 1-Gig attached UCS C-Series Cisco Public 33
34.
Dual Layer Nexus
6000 Data Center, Expansion 40-GigE Optimized low-latency switch fabric Data Center switching control plane distributed over Dual Layers. Aggregation (Spine): Layer-3 and services boundary, scale point to expand fabric. Access (Leaf): Physical TOR or FEX aggregation point, Layer-2 virtualization services. WAN / DCI L3 ----------L2 Nexus 6004 Spine FCoE iSCSI / NAS Multi-hop FCoE with dedicated links. Nexus 6001 Leaf Example Components: 2 x Nexus 6004, 4 x Nexus 6001 Layer-3 and Storage Licensing 24 x Nexus 2232PP/TM-E Enable FabricPath between tiers for configuration simplicity and future scale. BRKDCT-2218 © 2013 Cisco and/or its affiliates. All rights reserved. Rack Server Access with FEX Cisco Public Rack Server Access with FEX 34
35.
Dual Layer Nexus
7004 Data Center High Availability switching fabric with chassis-based Spine Data Center switching control plane distributed over Dual Layers. Aggregation (Spine): Layer-3 and services boundary, scale point to expand fabric. Access (Leaf): Physical TOR or FEX aggregation point, Layer-2 virtualization services. WAN / DCI L3 ----------L2 FCoE iSCSI / NAS FCoE support on dedicated links and VDC. Nexus 5500 or 6001 Leaf Example Components: 2 x Nexus 7004, 4 x Nexus 5548 Layer-3, VDC and Storage Licensing 24 x Nexus 2232PP/TM-E Enable FabricPath between tiers for configuration simplicity and future scale. BRKDCT-2218 © 2013 Cisco and/or its affiliates. All rights reserved. Rack Server Access with FEX Cisco Public Rack Server Access with FEX 35
36.
Dual Layer Nexus
7000/6000 Fabric with VDCs Virtual Device Contexts partitioning the physical switch WAN Nexus 7009 FabricPath Spine Highly Available design with dual-supervisor Add leaf pairs for greater end node connectivity Add spine nodes for greater fabric scale and HA FCoE support over dedicated links and VDC Core VDC L3 ----------L2 OTV VDC Spine VDC Storage VDC FCoE iSCSI / NAS Nexus 7000 Series Benefits: Integrated DCI support with OTV, LISP, and MPLS Feature-rich switching fabric with VDC’s, FEX, vPC, FabricPath, FCoE Nexus 7000 Service Module capability starting with Network Analysis Module (6.2/Freetown) Investment protection of a chassis-based solution BRKDCT-2218 © 2013 Cisco and/or its affiliates. All rights reserved. Nexus 6001 Leaf Rack Server Access with FEX Cisco Public Rack Server Access with FEX 36
37.
FabricPath with vPC+
Best Practices Summary • Manually assign physical and emulated switch ID’s to easily identify switches for operational support. • Configure all leaf switches with STP root priority, or use pseudo-priority to control STP. • Use vPC+ at the Leaf for port channels, and also at the Layer-2/3 spine to provide active/active HSRP. • FabricPath SW-ID: 102 • VPC Domain 100 • FP Emulated SW-ID 100 L3 ----------L2 Ensure all access VLANs are “mode fabricpath” to allow forwarding over the vPC+ peer-link which is a FabricPath link. • FabricPath SW-ID: 101 Set FabricPath root-priority on the Spine switches for multi-destination trees • • VPC Domain 10 • FP Emulated SWID 10 Convergence optimizations: Set linkup-delay timer to 60 seconds Set isis spf-interval 50 50 50, lsp-gen-interval 50 50 50 BRKDCT-2218 © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 37
38.
Summary: Scalable Midsize
Data Center Designs • Midsize Data Centers can benefit from the same technology advances as larger ones. • Increase the stability of larger Layer-2 workload domains using vPC, FabricPath, and vPC+. • Start with a structured approach that allows modular design as requirements grow. • Evaluate Nexus switching options based on feature support, scale, and performance. • Plan ahead for re-use of components in new roles as needs change. BRKDCT-2218 © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 38
39.
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