CISCO-CASA-MIB: View SNMP OID List / Download MIB

This MIB contains the basic objects for managing a Cisco Appliance Services Architecture (CASA) Entity. A CASA Entity can be a Manager or a Forwarding Agent as defined below. The basic objects included in this mib are those to configure CASA, retrieve CASA's state and information about the fixed affinity cache. The following gives a list of definitions and a description of how Service Managers and Forwarding Agents interact. For a more detailed description, see the Cisco Appliance Services Architecture (CASA) document. CASA is a protocol allowing software entities (called Appliances, examples are web caches, firewalls, load balancers) to control the behavior of network hardware devices (called Forwarding Agents, examples are switches or routers) by providing a set of rules used to handle network traffic. A Network Appliance (referred to as an Appliance) is any subsystem whose purpose is to provide a specific additional value-added service to the network device, and could be implemented as a standalone box, a line card or processor card, or a software subsystem. Examples of Network Appliances would include Load Balancers, WebCaches, and Firewalls. An Appliance tells Fowarding Agents how to handle packets based on their source and destination IP addresses and ports, and IP protocol fields. This set of information is called an Affinity. A Service Manager is an Appliance that requests packet flows from Forwarding Agents through CASA. A Real Server is a physical computing engine or part of that physical computing engine that offers one or more application services to a set of clients in the network. A packet flow is a TCP connection or a sequence of UDP packets between a client and a specific Real Server, pertaining to a specific application. Flows are represented by entries in the affinity cache tables. The Service Manager requests packet flows from Forwarding Agents by sending Affinities which contains wildcards on some of the Affinity fields. Affinities that contain wildcards in some of the fields are called Wildcard Affinities. The Service Manager may send the Forwarding Agent an Affinity containing explicit values for each of the fields. These Affinities are called Fixed Affinities. Typically Wildcard Affinities are used to instruct the Forwarding Agent to send packets received by the Forwarding Agent, which match the Wildcard Affinity, to the Service Manager. When the Service Manager receives the matching packet, the Service Manager typically will send the Forwarding Agent a Fixed Affinity. The Forwarding Agent uses Fixed Affinities to match packets coming from the network, execute any processing required on that packet, and forward that packet to a destination IP address (designated in the Fixed Affinity) called the Dispatch Address. When an IP packet arrives at the Forwarding Agent, the Forwarding Agent attempts to match the packet with the Fixed Affinities in the Fixed Affinity cache. If there is no match, an attempt is made to match the packet with the list of Wildcard Affinities. If there is no match the packet is routed normally. If there is a match with a Wildcard Affinity, the Forwarding Agent sends the packet to the Service Manager who will send the Forwarding Manager a Fixed Affinity which provides information on how to process IP packets similar to the one received by the Forwarding Agent. Processing of such packets may include sending the packet to the Service Manager. Such packets are called Interest Packets. Alternatively a Tickle Packet may be sent to the Service Manager which is an indication that a matched packet has been received by the Forwarding Agent. Reference: Cisco Appliance Services Architecture (CASA) document. _______________________________________ ( ) ( N E T W O R K ) (_______________________________________) | | | +---------------+ | | | |Service Manager|-+----------+--------------+ | +---------------+ | | | | | ++---------+ ++---------+ ++---------+ | F. Agent | | F. Agent | | F. Agent | +----------+ +----------+ +----------+ | | | ___|_________________|______________|__ ( ) ( N E T W O R K ) (_______________________________________)

Table of CASA configuration parameters.

A list of administrative values for CASA.

This indicates the user of the CASA component. casaForwardingAgent: indicates that the objects in this row pertain to the Forwarding Agent. casaGLoBalManager : indicates that the objects in this row pertain to the GLoBal Manager. casaUnknownManager : indicates that the associated service manager is not currently emumerated. Enumeration: 'casaUnknownManager': 3, 'casaForwardingAgent': 1, 'casaGLoBalManager': 2.

casaNotEnabled: indicates that CASA is not configured. casaEnabled : indicates that CASA is configured. If the CASA entity is a Forwarding Agent, it is waiting for a Wildcard Affinity. casaActive : indicates that CASA is operational. i.e. For the Service Manager this state indicates that at least one Wildcard Affinity has been sent. For a Forwarding Agent this state indicates that Wildcard Affinity has been received and CASA is forwarding matching IP packets to the Service Manager. Setting cCasaState to casaNotEnabled will shut CASA down. Setting cCasaState to casaEnabled results in the following sequence of events: The configuration parameters cCasaCfgAddress, cCasaCfgMcastAddress are validated. If validated CASA is shut down if its not already, followed by CASA being enabled with the configuration parameters taking effect. If the configuration parameters are not valid then the set operation fails. Setting cCasaState to casaActive is invalid. Enumeration: 'casaNotEnabled': 1, 'casaEnabled': 2, 'casaActive': 3.

true indicates that ciscoCasaStateChange notification is to be generated when the state changes. That is, the notification generation is enabled. false indicates that ciscoCasaStateChange notification generation is disabled.

The configured IP address of the CASA feature. This IP address is unique per box participating in CASA. This takes effect in the running system when cCasaState is set to casaEnabled, at which time this object is copied to cCasaAddress.

The configured IP subnet mask of the CASA feature. This takes effect in the running system when cCasaState is set to casaEnabled, at which time this object is copied to cCasaAddressMask.

The multicast IP address for this CASA Entity. This is used to listen for Wildcard Affinities in the case of a Forwarding Agent, or for sending Wildcard Affinities in the case of a Service Manager. This takes effect in the running system when cCasaState is set to casaEnabled, at which time this object is copied to cCasaMcastAddress.

The operational IP address of the CASA Entity. When cCasaState is set to casaEnabled, this object attains the value contained in cCasaCfgAddress. A get on this object when cCasaState is casaNotEnabled returns a noSuchObject exception.

The operational IP subnet mask of the CASA feature. When cCasaState is set to casaEnabled, this object attains the value contained in cCasaCfgAddressMask. A get on this object when cCasaState is casaNotEnabled returns a noSuchObject exception.

The operational multicast IP address for this CASA Entity. This is used to listen for Wildcard Affinities in the case of a Forwarding Agent, or for sending Wildcard Affinities in the case of a Service Manager. When cCasaState is set to casaEnabled, this object attains the value contained in cCasaCfgMcastAddress. A get on this object when cCasaState is casaNotEnabled returns a noSuchObject exception.

Table of Fixed Affinity cache statistics. The CASA Entity maintains a cache of Fixed Affinities. This table contains objects that detail the dynamics of the cache.

A list of Fixed Affinity cache statistics objects.

This is the number of affinities in the affinity cache. This is the number of entries in each of the following tables: cCasaAffinityCacheSrcTable, cCasaAffinityCacheDestTable, cCasaAffinityCacheDispatchTable

This is the maximum number of affinities (high water mark) concurrently held in the affinity cache since last time cCasaState transitioned to cCasaEnabled or since cCasaAffinityCacheHiWtrMrk was reset. Resetting this object is achieved via setting this object to 0. Attempting to set this object to any other value will result in a wrongValue error.

This indicates when cCasaAffinityCacheHiWtrMrk was set to 0.

Count of affinities which we were unable to enter in the affinity cache due to low memory conditions.

Number of packets which matched a Fixed Affinity stored in this Forwarding Agent Fixed Affinity cache.

Number of packets which matched a Fixed Affinity stored in this Forwarding Agent fixed affinity cache. This object is a 64-bit version of cCasaHits.

Number of packets which did not match a Fixed Affinity stored in this Forwarding Agent fixed affinity cache.

Number of packets which did not match a Fixed Affinity stored in this Forwarding Agent fixed affinity cache. This object is a 64-bit version of cCasaAffinityMisses.

Number of expected Fixed Affinities that were not received from the Service Manager for this Wildcard Affinity within a period of time from when a Fixed Affinity was requested by this Forwarding Agent.

Table of CASA statistics.

A list of Fixed Affinity cache statistics objects.

Number of Interest Packets send to the Service Manager by this Forwarding Agent or the number of Interest Packets received by this Service Manager.

Number of Tickle packets sent to the Service Manager by this Forwarding Agent or the number of Tickle Packets received by this Service Manager.

Table of Multicast ports used by the Casa Entity to listen for Wildcard Affinities in the case of a Forwarding Agent, or for sending Wildcard Affinities in the case of a Service Manager. Adding entries to this table allows Forwarding Agents and Service Managers to exchange Wildcard Affinities on that multicast port. In this way, groups of Forwarding Agents may be configured to participate with particular groups of Service Managers.

A list of administrative values for the CASA Entity. Rows in this table are created via cCasaAdminRowStatus in accordance with the RowStatus convention, and via the command line interface.

Multicast port which this CASA Entity uses to exchange Wildcard Affinities with its CASA Partner.

Multicast password corresponding to this Multicast port. This is used to authenticate all control flows between this CASA Entity and its CASA Partner. Issuing a set on this object with a zero length string indicates that the password is not in effect. For security purposes, a get on this returns a zero length string.

Number of seconds that the previous password stays in effect after receiving the new password. This is to allow all CASA components time to synchronize with the new password.

Count of multicast password authentication failures.

This object is used by a management station to create or delete the row entry in cCasaAdminTable following the RowStatus textual convention.

Table of Fixed Affinity cache entries. The number of entries for the specific Casa Entity is given by cCasaAffinityCacheNumOf.

A list of Fixed Affinity cache objects with indices ordered to allow access by source IP address. Entries are added to this table dynamically by the subagent when Fixed Affinities are sent or received by the Casa Entity. Entries are deleted via a timeout associated with the Fixed Affinity.

The value used to compare the source IP address of TCP and UDP packets.

The value of this index uniquely identifies entries in the table for the Casa Entity. This index is a constructed by concatenating values of SourceAddr, SourcePort, DestinationAddr, DestinationPort, and SrcProtocol. However the order is implementation specific to optimize processing of the powerful get next snmp operation.

The value used to compare the source port of the TCP and UDP packets.

The value used to compare the destination IP address of the TCP and UDP packets.

The value used to compare the destination port of the TCP and UDP packets.

The value used to compare the IP Protocol field of the TCP and UDP packets.

IP address to which this Casa Entity will forward packets which match this Affinity.

Table of Fixed Affinity cache entries. The number of entries for the specific Casa Entity is given by cCasaAffinityCacheNumOf. This table contains the same entries as cCasaAffinityCacheSrcTable. The order of the entries are in accordance with the described indices.

A list of Fixed Affinity cache objects with indices ordered to allow access by destination IP address. Entries are added to this table dynamically by the subagent when Fixed Affinities are sent or received by the Casa Entity. Entries are deleted via a timeout associated with the Fixed Affinity.

The value used to compare the destination IP address of the TCP and UDP packets.

The value of this index uniquely identifies entries in the table for the Casa Entity. This index is a constructed by concatenating values of SourceAddr, SourcePort, DestinationAddr, DestinationPort, and SrcProtocol. However the order is implementation specific to optimize processing of the powerful get next snmp operation.

The value used to compare the destination port of the TCP and UDP packets.

The value used to compare the source IP address of TCP and UDP packets.

The value used to compare the source port of the TCP and UDP packets.

The value used to compare the IP Protocol field of the TCP and UDP packets.

IP address to which this Casa Entity will forward packets which match this Affinity.

Table of Fixed Affinity cache entries. The number of entries for the specific Casa Entity is given by cCasaAffinityCacheNumOf. This table contains the same entries as cCasaAffinityCacheSrcTable. The order of the entries are in accordance with the described indices.

A list of Fixed Affinity cache objects with indices ordered to allow access by the dispatch IP address. Entries are added to this table dynamically by the subagent when Fixed Affinities are sent or received by the Casa Entity. Entries are deleted via a timeout associated with the Fixed Affinity.

IP address to which this Casa Entity will forward packets which match this Affinity.

The value of this index uniquely identifies entries in the table for the Casa Entity. This index is a constructed by concatenating values of SourceAddr, SourcePort, DestinationAddr, DestinationPort, and SrcProtocol. However the order is implementation specific to optimize processing of the powerful get next snmp operation.

The value used to compare the destination IP address of the TCP and UDP packets.

The value used to compare the destination port of the TCP and UDP packets.

The value used to compare the source IP address of TCP and UDP packets.

The value used to compare the source port of the TCP and UDP packets.

The value used to compare the IP Protocol field of the TCP and UDP packets.

This notification indicates that the cCasaState object has changed value. Issued when CASA is configured or removed on the CASA Entity. This is gated on cCasaStateNotificationEnabled.

The compliance statement for entities which implement the Cisco CASA MIB.

CASA global objects.

CASA configuration objects.

CASA affinity cache objects.

CASA statistics objects.

CASA obsolete objects.

A collection of objects providing CASA notifications.