•
The Cisco CSR 1000v interface bandwidth defaults to 1 GB, irrespective of the hypervisor
’
s physical
NIC bandwidth. The routing protocols (OSPF, EIGRP) use the Cisco CSR 1000v interface bandwidth
values for calculating the costs, not the physical NIC bandwidth.
•
When a Cisco CSR 1000v interface is directly connected to a physical router, and that physical router
’
s
connecting interface goes down, the change is not reflected on the Cisco CSR 1000v. This is because
the Cisco CSR 1000v is actually connected to the hypervisor
’
s vSwitch and the vSwitch uplink port is
connected to the physical interface of the router. This behavior is expected.
•
The Cisco CSR 1000v provides an MTU range from 1500 to 9216 bytes. However, ESXi 5.0 supports
only a maximum value of 9000 bytes.
Server Requirements
The server and processor requirements are different depending on the Cisco CSR 1000v release.
Table 5: Server Requirements
AMD
Intel
Cisco CSR 1000v Release
Not supported
Intel Nehalem and later generation
processors
Cisco IOS XE Release 3.9S
64-bit processors with VT extensions
64-bit processors with VT extensions
Cisco IOS XE Release 3.10S and later
The equivalent of 64-bit Intel Core2 and
later generation processors with VT
extensions and support for Streaming
SIMD instructions: SSE, SSE2, SSE3 and
SSSE3.
64-bit Intel Core2 and later generation
processors with VT extensions and support
for Streaming SIMD instructions: SSE,
SSE2, SSE3 and SSSE3.
Cisco IOS XE Denali 16.3.1 and later
For more information, see the release notes:
http://www.cisco.com/c/en/us/support/routers/
cloud-services-router-1000v-series/products-release-notes-list.html
(For Cisco IOS XE Release 3.9S) the Cisco CSR 1000v uses instructions not supported on Intel pre-Nehalem
generation processors. The existence of the required Nehalem or later processor instruction set is determined
at boot time. If the required instructions are not present, the following message is displayed:
%IOSXEBOOT-4-BOOT_HALT: (rp/0): Halted boot due to missing CPU feature
requirement(s)
(For Cisco IOS XE Denali 16.3 and 16.4) the Cisco CSR 1000v uses instructions supported on Intel Core 2
and later generation processors including Streaming SIMD: SSE, SSE2, SSE3 and SSSE3. The existence of
the required instruction set is not verified and the deployment of the Cisco CSR 1000v in an environment that
does not meet these processor requirements may result in random system reloads.
(For Cisco IOS XE Everest 16.5 and later) the Cisco CSR 1000v uses instructions supported on Intel Core 2
and later generation processors including Streaming SIMD SSE, SSE2, SSE3 and SSSE3. The existence of
the required streaming SIMD instruction sets is determined at boot time. If the required instructions are not
present, a message similar to following is displayed:
%CPPDRV-3-FATAL_CPU_FEATURE: F0: cpp_driver: CPP0: CPU lacks feature
(Supplemental Streaming SIMD Extensions 3 (SSSE3)). Packet forwarding disabled.
Cisco CSR 1000v Series Cloud Services Router Software Configuration Guide
26
Cisco CSR 1000v Series Cloud Services Router Overview
Server Requirements
