Server series C220 UCS
Hi all
I have to perform a new installation of CPU on the servers of the UCS. This is the first time that I am managing c-series servers and I would like to get some clarification on the Raid configuration.
The servers comes
MegaRAID 9266-8i + battery backup for C240 and C220 |
and that each server has four hard drives of 500 GB. Can you advise on which is the best raid level that I can use. I want to use raid 10, but I don't know how it should be configured?
Thank you.
Posted here
https://supportforums.Cisco.com/message/3647100#3647100
Tags: Cisco DataCenter
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Header note I found on the implementation of UCS for mulitcast NLBL:
Microsoft NLB can be deployed in 3 modes:
Unicast
Multicast
IGMP multicast
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IGMP multicast mode seems to be the more reliable deployment mode.
To do this, the monitoring settings:
All NLB Microsoft value "Multicast IGMP" nodes. Important! Check ths by logging into EACH node independently. Do not rely on the MMC of NLB snap.
An IGMP applicant must be present on the VLAN of NLB. If PIM is enabled on the VIRTUAL LAN that is your interrogator. UCS cannot function as applicant IGMP. If an interrogator of functioning is not present, NLB IGMP mode will not work.
You must have a static ARP entry on cheating it upstream pointing IP address Unicast NLB on the multicast MAC address NETWORK load balancing. This need will set up, of course, on the VLAN of the NLB VIP. The key is that the routing for the NLB VLAN interface must use this ARP entry as a unicast IP ARP response may not contain a multicast mac address. (Violation of the RFC 1812) Hosts on the NLB VLAN must also use the static entry. You may have several entries ARP. IOS can use a function of 'alias' of ARP. (Google it.)
How Microsoft NLB works. -The truncated for brevity Mac addresses.
TOPOLOGY OF NLB MS
NETWORK VLAN 10 = subnet 10.1.1.0/24 IP load balancing
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NODE-A (AA, MAC IP:10.1.1.88)
NŒUD-B (MAC BB, IP:10.1.1.99)
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MS NLB nodes will send the responses of IGMP queries.
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NOTES
This works in a VMware with N1k, standard vSwtich and vDS environment. Where surveillance IGMP is not enabled, the framing for VIP MAC NETWORK load balancing will be flooded.
NLB can only work with TCP-based services.
As stated previously mapping an IP unicast to a multicast mac address is a violation implied by RFC 1812.
TROUBLESHOOTING
Make sure your interrogator is working. Just to clarify that this does not mean that it is actually at work.
Wireshark lets check that IGMP queries are received by the NLB nodes.
Make sure that the ARP response works as expected. Once Wireshark again is your friend.
Look at the paintings IGMP snooping. Validate the L2 ports appearing as expected.
CSCtx27555 [Bug-preview for CSCtx27555] Unknown multicast with destination outside the range MAC 01:xx: are deleted. (6200 FI fixed in 2.0.2m)
IGMP mode not affected.
CSCtx27555 Unknown multicast with destination outside the range MAC 01:xx: are deleted.
fixed in 2.0(2m)
Solution: Change the NLB mode of operation of "Multicast" to "multicast IGMP', which modifies balancing load NETWORK VIP MAC at 0100.5exx.xxx Beach, allows to transfer occur as expected.
Q: and if I switch to switch mode, which means all of the profile and the settings on the servers are completely exhausted and I need to recreate them. ???
A:Cisco Unified Computing System Ethernet switching Modes
http://www.Cisco.com/en/us/solutions/collateral/ns340/ns517/ns224/ns944/whitepaper_c11-701962.html
-There is no impact on the configuration, you have done service profiles. they will continue to work as expected. Mode selector has the FI behave more like a conventional switch. Most notable is that Spanning tree will be activated and if you have several uplinks yew, tree covering weight will begin to block redundant paths.
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Nicolas,
If you ordered the server with RAID controller then he came with built-in RAID key to be installed on the system board. You'll need to order the following parts and install on the edge of the system in order to use the integrated RAID controller. It is important to note that ONLY windows and Linux are supported. To order the part as a spare just add an = sign at the end of the PID (e.g. UCSC-RAID-ROM55 =). It is a key that plugs directly into the card system that allows the on-board controller.
The cables connected to your 9266 can be re-used and connected to the SAS connectors on the system board. Once you have the part and recabled, you need to activate the controller embedded in the BIOS.
Steve McQuerry
UCS - Technical Marketing
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