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VMDC Architecture with Citrix NetScaler VPX and SDX
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VMDC Architecture with Citrix NetScaler VPX and SDX. NetScaler VPX and SDX Overview,NetScaler VPX and SDX Overview. The Citrix NetScaler products offer SLB and content switching along with application acceleration. Layer 4 Layer 7 L4 L7 traffic management data compression Secure Socket Layer SSL. acceleration network optimization and application security For the purposes of this validation and. documentation the focus was on using SLB SSL Offload and related features on the NetScaler as a. means of replacing the ACE SLB functionality in VMDC designs. NetScaler VPX has the same features as the NetScaler MPX physical appliance but is a virtual form of. the NetScaler product VPX is installed as a virtual machine VM on a hypervisor Currently VPX can. be installed on XenServer VMware and Hyper V The NetScaler VPX can handle up to 3 Gbps of HTTP. traffic when deployed on VMware or Hyper V Performance is based on the type of license installed on. the VPX instance For more information about performance for various VPX instances refer to. http www citrix com products netscaler application delivery controller features platforms vpx html. VPX on VMware was used for this validation so installation configuration requirements and examples. refer to the VMware hypervisor unless otherwise noted. NetScaler SDX is the multi tenant NetScaler appliance Figure 1 Multiple fully isolated fully. independent NetScaler instances can run on a single NetScaler SDX device The SDX appliance comes. with 10 Gbps Ethernet 10GE and 1 Gbps Ethernet 1GE ports type and number of ports depends on. the SDX model that can form an EtherChannel bundle which is desirable for an appliance based service. design in the VMDC architecture This evaluation used the SDX 20500 which provides four 10GE ports. and eight 1GE ports This model also has 16 SSL cores to handle SSL hardware acceleration The SDX. 20500 can support up to 20 NetScaler instances, Code versions earlier than NetScaler 10 1 do not support sharing EtherChannel among multiple. NetScaler instances on SDX Because EtherChannel sharing is a requirement for VMDC appliance. deployments testing was done using a beta of version 10 1 Throughput capacity depends upon which. SDX platform is used and which license is installed on the appliance Using the SDX 20500 a single. NetScaler instance can handle up to 18 Gbps of HTTP traffic The SDX 20500 appliance can handle an. aggregate throughput of 42 Gbps of HTTP traffic across multiple NetScaler instances. Figure 1 Citrix SDX Appliance,For more information about the SDX refer to. http www citrix com products netscaler application delivery controller features platforms sdx html. Both VPX and SDX can be configured using CLI or a browser based interface CLI configurations are. used as examples in this technical paper, VMDC Architecture with Citrix NetScaler VPX and SDX. VMDC Architecture with Citrix NetScaler VPX and SDX. VMDC Overview, NetScaler OS uses three different types of IP addresses.
NetScaler IP NSIP This IP address refers to the management address Although a separate. management subnet is not required this design was used for this evaluation. Subnet IP SNIP This IP address is a subnet IP that represents an interface the NetScaler device. uses to pass traffic between the server farm and clients By default this address type is used as the. source IP address for Source NATing packets from outside clients. Virtual IP VIP Outside clients use this shared address to connect to the server farm. Mapped IP MIP Server side connections use MIP addresses when no SNIP is configured and. when the USNIP option is disabled by default this option is enabled. For more information about NetScaler IP addressing refer to. http support citrix com proddocs topic ns system 10 map ns nw ipaddrssng confrng ns ownd ip add. rss con html,VMDC Overview, VMDC is the Cisco reference architecture for IaaS cloud deployments and there have been multiple. VMDC designs as platforms and technologies evolve The VMDC 2 x architecture is VRF Lite and. Virtual Port Channel vPC based and VMDC 2 2 is the large scale version of this architecture with. VMDC 2 3 being an optimized and smaller footprint version The VMDC 3 x architecture is VRF Lite. and FabricPath based, The VMDC IaaS cloud architecture is designed around a set of modular DC components comprised of. building blocks of resources called pods which comprise. Cisco Unified Computing System UCS, Storage area network SAN and network attached storage NAS storage arrays. Access switching layers and aggregation switching and routing layers connecting to the Data. Center Services Node DSN or Appliance based services layer. Multiple 10 GE fabrics using highly scalable Cisco network switches and routers. VMDC is built around Cisco UCS Cisco Nexus 1000V Nexus 5000 and Nexus 7000 switches Cisco. Multilayer Director Switch MDS Cisco Aggregation Services Router ASR 9000 ASR 1000 Cisco. Adaptive Security Appliance ASA 5585 X or ASA Services Module ASASM Cisco Catalyst 6500. DSN Cisco ACE Nexus 1000V Virtual Security Gateway VSG VMware vSphere EMC VMAX and. NetApp FAS storage arrays Cloud service orchestration is currently provided by the BMC Cloud. Lifecycle Management CLM suite Refer to VMDC system releases. Note NetScaler products were not evaluated in the VMDC 2 3 architecture because of time and lab availability. constraints However results and observations are expected to be similar to those for VMDC 2 2. VMDC 2 2 Architecture, VMDC 2 2 uses a hierarchical network design for high availability and scalability The hierarchical. layered data center design uses redundant switches at each network layer in the network topology for. device level failover that creates a highly available transport between end nodes using the network. Modules populating a slot in a network switching node or standalone service appliances provide. additional services such as SLB firewall and intrusion prevention. VMDC Architecture with Citrix NetScaler VPX and SDX. VMDC Architecture with Citrix NetScaler VPX and SDX. VMDC Overview, Each service approach supports redundant hardware deployment to preserve the high availability.
standards set by the network topology This layered approach the basic foundation of the VMDC design. provides scalability performance flexibility resiliency and service assurance. Virtual LANs VLANs and virtual routing and forwarding VRF instances provide tenant isolation in. the VMDC architecture Routing protocols in the VRF instances interconnect the various networking and. service devices The VMDC 2 2 architecture is based on a VRF Lite design end to end through the data. center routing platforms with routing between the VRF instances provided by BGP peering. Note For detailed descriptions of the VMDC 2 2 architecture refer to the following documents. VMDC 2 2 Design Guide,VMDC 2 2 Implementation Guide. The layered VMDC 2 2 architecture comprises core aggregation services and access layers This. architecture enables data center modules pods and compute blocks to be added as demand and load. increases The architecture also provides flexibility to create different logical topologies using device. virtualization service devices insertion and traditional L2 and L3 network configurations Figure 2. provides a logical representation of the VMDC 2 2 architecture with the services layer comprised of the. Catalyst 6500 DSN ACE30 and ASA 5585 X or ASASM, In this design the Load Balancing services are provided by the Cisco ACE30 module residing in the. Cisco Catalyst 6500 Data Center Services Node DSN As described later in this document the ACE30. can be replaced by the Citrix SDX multi tenant appliance connecting to the Cisco Nexus 7000. Aggregation layer or by the Citrix VPX per tenant virtual appliance installed in the UCS compute layer. Figure 2 VMDC 2 2 Logical Diagram, VMDC Architecture with Citrix NetScaler VPX and SDX. VMDC Architecture with Citrix NetScaler VPX and SDX. VMDC Overview,VMDC 2 3 Architecture, The VMDC 2 3 system leverages the end to end architecture defined in VMDC 2 2 with some. optimizations in the platforms and tenancy models to reduce the cost and footprint of the solution while. increasing the tenant scale The VMDC 2 3 design comprises of WAN aggregation and services layers. with the services being provided by appliances connecting directly to the aggregation layer Figure 3. provides a logical representation of the VMDC 2 3 architecture with the services layer comprised of the. Cisco ACE 4710 and ASA 5585 X appliances connecting to the Cisco Nexus 7004 aggregation nodes. Note For detailed descriptions of the VMDC 2 3 architecture refer to the following documents. VMDC 2 3 Design Guide,VMDC 2 3 Implementation Guide.
In this design the Load Balancing services are provided by the multi tenant ACE 4710 appliance. connecting through vPC to the Nexus 7004 As described later in this document the ACE 4710 can be. replaced by the Citrix SDX multi tenant appliance connecting to the Nexus 7004 Aggregation layer or. by the Citrix VPX per tenant virtual appliance installed in the UCS compute layer. Figure 3 VMDC 2 3 Logical Diagram,VMDC 3 0 Architecture. VMDC 3 0 introduces Cisco FabricPath as an optional L2 alternative to a hierarchical vPC based design. for the intra data center network FabricPath simplifies and expands L2 network design removing the. complexities of Spanning Tree Protocol STP and thus enabling more extensive flexible and scalable. VMDC Architecture with Citrix NetScaler VPX and SDX. VMDC Architecture with Citrix NetScaler VPX and SDX. NetScaler VPX in VMDC, L2 designs Other VMDC releases will follow as Cisco develops and evolves FabricPath While. FabricPath comprises an improved L2 multipathing technology vPC based resiliency remains a valid. option in the VMDC portfolio Customers will continue to be able to choose between vPC based and. FabricPath designs to meet their requirements This design modified only the Unified Fabric and Data. Center Networking layer of the architecture leveraging existing design guidance for Unified Computing. and Integrated Systems UCIS and DCI layers, Figure 4 provides a logical representation of the VMDC 3 0 Typical DC architecture with FabricPath. providing the L2 fabric within a VMDC Pod The Pod consists of Nexus 7000 5500 switches as. FabricPath leaf nodes and Nexus 7000 as the FabricPath spine and L3 Aggregation node The services. within the pod are provided by the Cisco ACE 4710 and ASA 5585 X appliances connecting to the Cisco. Nexus 7000 spine aggregation nodes, Note For detailed descriptions of the VMDC 3 0 architecture refer to the following documents. VMDC 3 0 Design Guide,VMDC 3 0 Implementation Guide.
In this design the Load Balancing services are provided by the multi tenant ACE 4710 appliance. connecting through vPC to the Nexus 7000 As described later in this document the ACE 4710 can be. replaced by the Citrix SDX multi tenant appliance connecting to the Nexus 7000 Spine Aggregation. layer or by the Citrix VPX per tenant virtual appliance installed in the UCS compute layer. Figure 4 VMDC 3 0 Typical Data Center Design, Note The NetScaler products were not evaluated in the VMDC 3 0 1 architecture However results and. observations are expected to be similar to those seen with VMDC 3 0. NetScaler VPX in VMDC, The NetScaler VPX supports application load balancing and optimization in the compute layer at rates. of up to 3 Gbps It is inserted in the VMDC architecture in the compute layer installed as a virtual. machine VM on the VMware hypervisor Each consumer or tenant can be assigned their own VPX. VMDC Architecture with Citrix NetScaler VPX and SDX. VMDC Architecture with Citrix NetScaler VPX and SDX. NetScaler VPX in VMDC, instance Those requiring multiple server segments can be serviced by the same VPX as it can be. installed with one or more interfaces one interface can be configured as a trunk making it capable of. servicing multiple server segments, Alternatively multiple VPX instances can be installed in a consumer container to accommodate each. server segment The VMDC design prescribes for the server load balancing to be done after security. checks therefore the VPX connection should exist on the inside network of any firewall within the. container In one armed mode this means that traffic between the load balancer and tenant VM s will no. longer have to traverse the access layer or aggregation layer in the infrastructure as this traffic needs. only traverse the Nexus 1000V in the compute layer Figure 5. Figure 5 VPX in VMDC 3 0 Palladium Network Container. Note While this validation and document covers the use of Citrix VPX in a VMDC 3 0 based Palladium. Network Container the VPX can be used in a similar fashion in the VMDC 2 2 and 2 3 Gold and Silver. Network Containers,Evaluation Topology and Methodology.
The VPX was inserted in a network container with one server segment and deployed in one armed mode. as this is how SLB is typically configured in the VMDC reference design Figure 6 The aggregation. Nexus 7000 was used as the default gateway for the tenant VMs and the VPX. VMDC Architecture with Citrix NetScaler VPX and SDX. VMDC Architecture with Citrix NetScaler VPX and SDX. NetScaler VPX in VMDC,Figure 6 Evaluation Logical Topology. Installation requirements for the VPX VM on VMware include. At least one vNIC a separate interface is not required for High Availability. The VPX VM used for testing was allocated the following resources. 2 vNICs one for management and one for data traffic. The testing scope was similar to the Cisco ACE testing in VMDC NetScaler VPX has many features. but only SLB and SSL acceleration were tested for this evaluation which validated the following. L4 server load balancing,L7 server load balancing,Server Health Check. SSL Offload,High availability,Dynamic Routing, VMDC Architecture with Citrix NetScaler VPX and SDX. VMDC Architecture with Citrix NetScaler VPX and SDX. VPX Evaluation Observations and Deployment Considerations. VPX Evaluation Observations and Deployment Considerations. The following sections provide detailed VPX evaluation observations and deployment considerations. Evaluation Topology and Methodology page 7,Server Load Balancing page 9. Server Health Check page 10,SSL Offload page 10,L4 L7 Access Control Lists page 10.
High Availability page 11,Dynamic Routing page 11,IPv6 page 12. VPX Performance Results page 12,Testing Environment Components page 13. VPX Installation on VMware Hypervisor, As stated previously the VPX is installed as a VM on the VMware hypervisor The ovf file and other. VMware related files can be obtained from the Citrix website with a valid myCitrix account No license. is needed to install the VM but a license is required for operation After the files are obtained. installation is performed using the ovf file Up to 10 interfaces and more than one CPU can be allocated. to the VPX VM See the previous section for installation requirements. Console access through VMware must be used to configure out of band management access using the. CLI The default user name and password are nsroot To configure management access the following. configuration is needed, set ns config IPAddress 172 26 162 225 netmask 255 255 0 0. This IP address maps to the first port on the VPX VM It must be connected to the management VLAN. for OOB management to be possible Once the NSIP is configured all management access methods are. available by default SSH telnet HTTP FTP To configure the other data interface IP addresses SSH. access can be used to get to the CLI IP addresses for data must be entered in the order they were created. on the VM The command to add a SNIP is as follows, add ns ip 10 110 191 250 255 255 255 0 vServer DISABLED dynamicRouting ENABLED.
Server Load Balancing, The VPX was tested as both an L4 TCP and L7 HTTP load balancer It can be configured to use many. different load balancing algorithms such as least connections and round robin The following. configuration which was used in the evaluation uses a round robin algorithm. add lb vserver vip 1 http 80 HTTP 10 110 191 200 80 persistenceType NONE lbMethod. ROUNDROBIN cltTimeout 180 icmpVsrResponse ACTIVE, In this example the VIP uses port 80 for the IP 10 110 191 200. To bind servers to this VIP server objects must be created and then bound to a service that is eventually. bound to the VIP, VMDC Architecture with Citrix NetScaler VPX and SDX. VMDC Architecture with Citrix NetScaler VPX and SDX. VPX Evaluation Observations and Deployment Considerations. add server server 1 10 110 191 100, add service service 1 http 80 server 1 HTTP 80 gslb NONE maxClient 0 maxReq 0 cip. DISABLED usip NO useproxyport YES sp ON cltTimeout 180 svrTimeout 360. CustomServerID None CKA YES TCPB YES CMP NO,bind lb vserver vip 1 http 80 service 1 http 80.
For layer 4 testing the VIP is configured as a TCP VIP while the service bound to the VIP is a layer 7. add lb vserver vip 1 tcp TCP 10 110 191 200 persistenceType NONE lbMethod. ROUNDROBIN cltTimeout 180 icmpVsrResponse ACTIVE,bind lb vserver vip 1 tcp service 1 http 80. Server Health Check, VPX can be configured to determine whether a server is down using many different monitors including. ICMP and TCP UDP The following configuration snippet from the evaluation uses the default ICMP. bind service service 1 http 80 monitorName ping, VPX can detect server failure as it was configured. SSL Offload, VPX was configured to perform SSL transactions for a group of HTTP servers In this configuration. clients initiate an SSL connection to the VIP VPX then creates an HTTP connection to the real server. A generic certificate was generated on VPX for testing purposes The certificate for the server was. installed on VPX so that it can act as a proxy for the real server It is also possible to configure VPX to. make a secure connection to the real server using SSL but that configuration was not used. set ssl vserver vip 1 ssl 443 eRSA ENABLED,bind lb vserver vip 1 ssl 443 service 1 http 80.
bind ssl service nshttps 1l 443 certkeyName ns server certificate. For more information about generating SSL certificates on VPX refer to URL. http support citrix com proddocs topic netscaler traffic management 10 map ns ssl generate server t. est cert tsk html, For more information SSL about offload configuration refer to. http support citrix com proddocs topic netscaler traffic management 10 map ns ssl config ssloffload. ing con html,L4 L7 Access Control Lists, VPX can protect the VIP from unauthorized connections using an ACL These lists can be applied to any. VPX segment and can even be used to protect the VPX VM management interface These ACLs can be. standard IP or extended L4 L7 In this configuration snippet the VIP is being protected from a. certain client, add ns acl block outside client DENY srcIP 10 110 192 100 destIP. 10 110 191 1 10 110 191 254 destPort 80 protocol TCP interface 1 1 priority 10. state ENABLED kernelstate APPLIED, VMDC Architecture with Citrix NetScaler VPX and SDX. VMDC Architecture with Citrix NetScaler VPX and SDX. VPX Evaluation Observations and Deployment Considerations. High Availability, VPX supports active standby failover and clustering In high availability HA mode heartbeat packets.
are sent on all active interfaces therefore there is no need to dedicate an interface for this purpose. Failover in HA mode during normal operations takes at least three seconds This is because failover. depends on the configured dead interval By default this is three seconds which is also the shortest time. that can be configured for this parameter The dead interval indicates how long the secondary VPX will. wait for heartbeat packets before it considers the primary VPX to be down During failover connections. must be reestablished on the new primary instance of the VPX. To create an HA pair the following needs to be configured on the primary VPX first. add HA node 1 172 26 162 227, The IP address refers to the VPX NSIP that is the secondary in the pair The number 1 represents the. node ID that is local to VPX and must be unique for each node added For this evaluation the default. value for the dead interval was used, For more information about configuring HA please refer to the following url. http support citrix com proddocs topic ns system 10 map ns nw ha intro wrppr con html. Clustering is a NetScaler feature that supports making multiple VPX instances appear as one device. This feature was not tested in this evaluation For more information on clustering refer to. http support citrix com article CTX132840,Dynamic Routing. VPX supports the following routing protocols RIP OSPF ISIS and BGP Dynamic routing must be. enabled on the IP interface used to connect to the routing protocol VMDC 3 0 uses OSPF as the internal. routing protocol within the DC so VPX was configured to participate in this OSPF process. router ospf 1,redistribute static,area 0 range 10 110 191 0 24. network 10 110 191 0 24 area 0, This configuration must be entered in the Virtual Teletype Shell interface VTYSH This shell can be.
accessed by connecting to the VPX CLI and entering vtysh. Alternately BGP can also be used as the DC routing protocol for a VMDC implementation as in the. VMDC 2 2 and 2 3 designs The configuration for BGP on VPX must also be entered in VTYSH An. example follows,router bgp 13,bgp router id 10 110 191 250. network 10 110 191 0 24,neighbor 10 110 191 251 remote as 13. For more information on configuring dynamic routing protocols on VPX refer to. http support citrix com proddocs topic ns system 10 map ns nw iprouting config dyna rout con htm. VMDC Architecture with Citrix NetScaler VPX and SDX. VMDC Architecture with Citrix NetScaler VPX and SDX. VPX Evaluation Observations and Deployment Considerations. VPX can perform SLB and SSL offloading in IPv6 mode and can simultaneously service IPv4 and IPv6. traffic flows This evaluation tested basic load balancing and SSL offloading using IPv6 The following. configuration snippet shows a basic load balancing and SSL offloading configuration using IPv6. add server server 1 ipv6 2001 db8 c18 1 4,add server server 2 ipv6 2001 db8 c18 1 5. add service service 1 ipv6 http 80 server 1 ipv6 HTTP 80 gslb NONE maxClient 0. maxReq 0 cip DISABLED usip NO useproxyport YES sp OFF cltTimeout 180 svrTimeout. 360 CustomServerID None CKA YES TCPB YES CMP YES, add service service 2 ipv6 http 80 server 2 ipv6 HTTP 80 gslb NONE maxClient 0. maxReq 0 cip DISABLED usip NO useproxyport YES sp OFF cltTimeout 180 svrTimeout. 360 CustomServerID None CKA YES TCPB YES CMP YES, add lb vserver vip 1 ipv6 http 80 HTTP 2001 db8 c18 1 10 80 persistenceType NONE.
cltTimeout 180, add lb vserver vip 1 ipv6 ssl 443 SSL 2001 db8 c18 1 10 443 persistenceType NONE. cltTimeout 180, bind lb vserver vip 1 ipv6 http 80 service 1 ipv6 http 80. bind lb vserver vip 1 ipv6 http 80 service 2 ipv6 http 80. bind lb vserver vip 1 ipv6 ssl 443 service 1 ipv6 http 80. bind lb vserver vip 1 ipv6 ssl 443 service 2 ipv6 http 80. VPX Performance Results, VPX throughput depends upon which license is purchased for a particular VPX instance For this. evaluation VPX was licensed for 3 Gbps Traffic generation was done using a Spirent 9000A chassis. equipped with a CV 10G S8 card Table 1 shows the results gathered from the performance tests for this. evaluation,Table 1 VPX on VMware Performance Results. L4 throughput 3 2 Gbps,L4 connections per second 77 000.
L4 concurrent connections 253 000,L7 throughput 2 5 Gbps. L7 connections per second 400 000,L7 concurrent connections 112 000. SSL transactions per second 2300,SSL throughput 1 0 Gbps. The Spirent chassis emulated both clients and real servers The VIP was configured on the VPX instance. Throughput tests involved a mix of traffic including FTP and DNS and a mix of packet sizes. Connection and transaction tests used one protocol HTTP in most cases Figure 7 shows the logical. VMDC Architecture with Citrix NetScaler VPX and SDX. VMDC Architecture with Citrix NetScaler VPX and SDX. VPX Evaluation Observations and Deployment Considerations. Figure 7 Logical Topology for Performance Testing,Testing Environment Components. Table 2 lists the hardware and software versions used to evaluate VPX installed on VMware. Table 2 Testbed Validated Components,Product Description Hardware Software.
Citrix NetScaler VPX Virtualized Load Balancer N A 10 0. Cisco ASA 1000V Virtualized ASA VPN N A 8 7 1,Gateway Firewall. Cisco Nexus 1000V Distributed Virtual Switch N A NX OS. 4 2 1 SV1 5 2, Cisco UCS Compute Blade Servers UCS 6120XP Fabric 2 0 2q. Interconnect,UCS 5108 chassis,UCS 2104XP IOM,UCS B200 blades with. 48G RAM UCS,M81KR Adapter, Cisco Nexus 7000 Data Center Aggregation and Nexus 7010 6 0 4. Core devices,N7K M132XP 12, VMDC Architecture with Citrix NetScaler VPX and SDX.
VMDC Architecture with Citrix NetScaler VPX and SDX. SDX Evaluation in VMDC,Table 2 Testbed Validated Components continued. Product Description Hardware Software, Cisco Nexus 5000 Data Center Access device Nexus 5548UP 5 1 3 N2 1. VMware Virtualization Hypervisor N A 5 0 0 Build 623373. vSphere ESXi,SDX Evaluation in VMDC, The following sections provide detailed SDX evaluation considerations. SDX in VMDC 3 0 page 14,Evaluation Topology and Methodology page 15. Performance and Convergence Results page 17,SDX in VMDC 3 0.
Citrix NetScaler SDX is a virtualized physical appliance that supports multiple independent isolated. NetScaler instances running on the same appliance In either a hierarchical classical Ethernet type Data. Center architecture such as VMDC 2 X systems or CLOS type FabricPath designs as in VMDC 3 x. systems SDX is typically be placed in a services layer of the infrastructure connecting to aggregation. nodes or FabricPath aggregation edge nodes, SDX is equipped with 1 GE and 10 GE ports type and number vary based on SDX model that connect. to the of the data center infrastructure they service Each NetScaler instance on the SDX appliance has. its own set of resources that are isolated from other NetScaler instances Each NetScaler instance is. functionally identical to a VPX virtual appliance and NetScaler MPX physical appliances A NetScaler. instance on an SDX 20500 used for this validation can handle speeds up to 18 Gbps while the SDX. 20500 can handle an aggregate throughput of 42 Mbps. As previously noted the VMDC 3 0 design is based on a FabricPath based network fabric Like other. appliance based service designs the SDX would typically connect to this fabric using a classical. Ethernet vPC trunk connecting it to the aggregation layer of the data center fabric In this case the. interfaces used to connect SDX to the aggregation layer are configured as an EtherChannel trunk In. NetScaler release 10 0 and earlier an EtherChannel could be used by only one VPX instance at a time. In release 10 1 an EtherChannel can be shared among the NetScaler instances housed on an SDX. VMDC Architecture with Citrix NetScaler VPX and SDX. VMDC Architecture with Citrix NetScaler VPX and SDX. SDX Evaluation in VMDC,Figure 8 SDX Network Topology in VMDC 3 0. Note While this validation and document covers the use of Citrix SDX in a VMDC 3 0 based Palladium. Network Container the SDX can be used in a similar fashion in the VMDC 2 2 and 2 3 Gold and Silver. Network Containers, The installation process involves bringing up the SDX appliance then bringing up the NetScaler. instances Licensing is different from the VPX on VMware in that a license is needed for the SDX. appliance not the VPX instances For more information on SDX installation refer to. http support citrix com proddocs topic netscaler getting started map 10 ns instpk install ns wrapper. Evaluation Topology and Methodology, This component of the evaluation looked at how SDX can be used in VMDC 3 0 including failure. convergence scenarios We tested the following features along with performance and convergence using. Spirent Avalanche and IXIA for cases which required traffic generation. L4 SLB and ACL,DSCP preservation,High Availability.
In the case of the Cisco ACE HA involves a Fault Tolerance partnership between the two ACE. appliances Each SLB context is active on one ACE appliance and standby on the other appliance. VMDC Architecture with Citrix NetScaler VPX and SDX.

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