This secures interfaces from sending traffic in the event any port profiles or policies have changed since last reboot or module insertion. All other non-system VLANs are rightfully BLKing until the VSM passes the VEM its policy. You have to be able to FWD some traffic in order to reach the VSM in the first place - so we allow a very small subnet of interfaces to FWD before the VSM send the VEM's programming - Management, IP Storage and Control/Packet only. Also, when a VEM is reboot, a system vlan interface will be FWDing before the VEM attaches to the VSM to securely retrieve it's programming. You can't shut down a system vlan interface. System VLANs allow an interface to always be forwarding. I've tirelessly explained this on vaiours posts. You have to understand what a system vlan is first. You do not recommend this in previous threads. Concerning Nk1: Jason Nash has said to include vMotion in the System VLANs. Just have to enable Jumbo MTU support upstream.Ĥ. This is the "best" way to configure it but I find most people just end up changing the "Best Effort" class to 9000 MTU for simplicity sake - which doesn't require any upstream tinkering with CoS marking. Once UCS receives the traffic with the appropriate CoS marking it will honor the QoS and dump the traffic back into the Silver queue. Configuring Jumbo frames and CoS marking is pretty well documented all over. N5K is different than N7K and different than IOS. The specifics for configuring the switch are specific to the model and SW version. If your vNICs were assigne a QoS policy using "Silver" (which has a default CoS 2 value), then you would want to do the same upstream by a) configuring the N5K system MTU of 9216 and tag all traffic from the iSCSI Array target's interface with a CoS 2. You have UCS and an upstream N5K with your iSCSI target directly connected to an N5K interface. The bandwidth percentage can be determined by adding the channel weights for all channels then divide the channel weight you wish to calculate the percentage for by the sum of all weights.Įxample. The Plat, Gold, Silver, Bronze are user friendly words used in UCS Classes of Service to represent a defineable CoS value between 0 to 7 (where 0 is the lowest value and 6 is highest value). You can use one of the other available classes on UCS for this - Bronze, Silver, Gold, Platinum."ĭoes the Cisco switch also use the same terms "Bronze", Silver", "Gold" or "Platimum" for the classes? Should I configure the trunk with the same CoSes? Depending on the switch you'll want to set it at either 9000 or 9216 (whichever it supports).Įnsure the switch north of the UCS Interconnects are marking the iSCSI target return traffic with the same CoS marking as UCS has configured for jumbo MTU. UCS supports up to 9000 then assumed overhead. With the 1000v you can also leverage CBWFQ which can auto-classify traffic types such as "Management", "Vmotion", "1000v Control", "IP Storage" etc. Management Port profiles should be set as "system vlans" to ensure access to manage your hosts is always forwarding. This way they don't need vmware admins to manage virtual switches - keeps it all in the hands of the networking team where it belongs. Many customers run all their virtual networking on the 1000v. What is the reason I cannot use a 1000V uplink profile for the vMotion and management? Is it just for simplicity people do it that way? Or can I do it if I want? What do you do?
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