Management IP Address
Each server in a Cisco UCS domain must have a one or more management IP addresses assigned to its Cisco Integrated Management Controller (CIMC) or to the service profile associated with the server. Cisco UCS Manager uses these IP addresses for external access that terminates in the CIMC. This external access can be through one of the following services:
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KVM console
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Serial over LAN
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An IPMI tool
The management IP addresses used to access the CIMC on a server can be out-of-band (OOB) addresses, through which traffic traverses the fabric interconnect via the management port, or inband addresses, through which traffic traverses the fabric interconnect via the fabric uplink port. Up to six IP addresses can be configured to access the CIMC on a server, two out-of-band (OOB) and four inband.
You can configure the following management IP addresses:
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A static OOB IPv4 address assigned directly to the server
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An OOB IPv4 address assigned to the server from a global ext-mgmt pool
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An inband IPv4 address derived from a service profile associated with the server
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An inband IPv4 address drawn from a management IP pool and assigned to a service profile or service profile template
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An static inband IPv6 address assigned directly to the server
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An inband IPv6 address derived from a service profile associated with the server
You can assign multiple management IP addresses to each CIMC on the server and to the service profile associated with the server. If you do so, you must use different IP addresses for each of them.
A management IP address that is assigned to a service profile moves with that service profile. If KVM or SoL sessions are active when you migrate the service profile to another server, Cisco UCS Manager terminates the sessions and does not restart them after the migration is completed. You configure the IP address when you create or modify a service profile.
Note |
You cannot assign a static IP address to a server or service profile if that IP address has already been assigned to a server or service profile in the Cisco UCS domain. If you attempt to do so, Cisco UCS Manager warns you that the IP address is already in use and rejects the configuration. |
A unicast Internet Control Message Protocol (ICMP) request will be sent to the gateway IP address every second from each server that is configured with an inband IP address. This request is to check if connectivity for the inband traffic through the current Fabric Interconnect (FI) is up, and to initiate a failover to the other FI if it is down. The path selected for inband and the failover operations are completely independent of the server data traffic. The default polling interval is 1 second and the polling interval is configurable to a maximum of 5 seconds. After three failed polls, the CIMC will failover to the other FI. During failover, the CIMC will issue a Gratuitous Address Resolution Protocol (GARP) on the newly selected uplinks to notify the network that the MAC has been moved to a new location.