Cisco Cisco Expressway 安装指南
Deployment size
vCPU
Reserved CPU resource
Note
Reserved RAM
Disk space
NIC
Small (for BE 6000 platform)
2 core
3600 MHz (2 x 1.8 GHz)
4 GB
132 GB
1 Gb
Medium (typical installation)
2 core
4800 MHz (2 x 2.4 GHz)
6 GB
132 GB
1 Gb
Large (extra performance and
scalability capabilities)
scalability capabilities)
8 core
25600 MHz (8 x 3.2 GHz)
Note
8 GB
132 GB
10 Gb
Table 2 Required Minimum Specifications by Deployment Size
For all deployment sizes, you need:
■
VM host operational and running ESXi 5.0 (Update 1), ESXi 5.1, ESXi 5.5, or ESXi 6.0
Note:
As of X8.7, the virtual hardware version of Expressway has changed from 7 to 8. This change means that
ESX/ ESXi version 4.x is explicitly not supported as a platform for Expressway VMs running X8.7.
■
vCenter or vSphere client operational
■
Reserved RAM, CPU, and NIC as per table above
When using vSphere client, configure the network properties through the console.
Co-residency Support
The Expressway can co-reside with applications (any other VMs occupying same host) subject to the following
conditions:
conditions:
■
no oversubscription of CPU: 1:1 allocation of vCPU to physical cores must be used
■
no oversubscription of RAM: 1:1 allocation of vRAM to physical memory
■
no oversubscription of NIC: The Expressway handles large volumes of data, much of which is for real-time
communications, and it needs dedicated access to all the bandwidth specified for its interfaces.
communications, and it needs dedicated access to all the bandwidth specified for its interfaces.
For example, you should not assume that four co-resident small Expressway VMs can handle the expected
load if there is only a 1 Gbps physical interface on the host. In this example, none of the VMs meet the required
minimum specification.
load if there is only a 1 Gbps physical interface on the host. In this example, none of the VMs meet the required
minimum specification.
■
sharing disk storage subsystem is supported subject to correct performance (latency, bandwidth)
characteristics
characteristics
Note: CPU Reservation Requirement Change in X8.8
The Large Expressway VM CPU reservation requirement has been reduced from 25600 MHz to 16000 MHz. This
means that two Large Expressway VMs can now comfortably co-reside on a UCS server with two eight-core 3.2 GHz
processors, when hyperthreading is enabled. This was not previously possible because the higher reservation
requirement, added to the CPU requirement for the hypervisor, exceeded the total processing power of the host.
means that two Large Expressway VMs can now comfortably co-reside on a UCS server with two eight-core 3.2 GHz
processors, when hyperthreading is enabled. This was not previously possible because the higher reservation
requirement, added to the CPU requirement for the hypervisor, exceeded the total processing power of the host.
The new reservation does not limit the maximum Expressway CPU speed; the Expressway can use the headroom
provided by the higher specification host.
provided by the higher specification host.
Installation Process
This process guides you through installing the Expressway VM using vCenter or vSphere client.
Configuring the VM Host
Ensure that the VM host is configured with a valid NTP server – the same NTP server that will be specified in
Expressway.
Expressway.
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Cisco Expressway on Virtual Machine Installation Guide
Installing a Virtual Machine