13.10.2 |
SNMP functions |
13.10.2.1 |
Introduction |
| As part of the TCP/IP protocol family, the Simple Network Management Protocol (SNMP) is an easy-to-use platform for performing management tasks in the HiPath 3000/5000 system software. SNMP is used as a kind of management agent in HiPath 3000/5000, making it possible to monitor and administer LAN components (including HiPath 3000/5000 itself) from a central location. It is possible to |
| • | addressing HiPath 3000/5000 via the TCP/IP protocol family. |
| • | external management applications, such as HP Open View and IBM Tivoli, to access data in HiPath 3000/5000 (using SNMP messages, such as GET, SET, TRAP). |
| • | implementing remote maintenance tasks (online port status, enabling and disabling ports, determining free ports) (HiPath Fault Management) |
| • | transmit service-related Class B errors. |
| • | visualizing the operating status of HiPath 3000/5000 systems. |
13.10.2.2 |
Overview of SNMP Functions |
Management Information Bases (MIBs) |
| MIBs define the volume of data that can be administered via SNMP. They are data models that describe the network elements to be administered in a very specific form. |
| HiPath 3000/5000 supports |
| • | standard MIB II (according to the RFC1213 Internet standard), which provides Internet and router functions; |
| • | parts of the RMON 1/2 standard MIBs (RFC 1757, RFC 2021), which support |
| - | Error history |
| - | Trap configuration |
| - | TFTP configuration |
| - | General system information |
| • | a user-specific MIB that processes HiPath-specific statistic data (feature counters) and internal error messages (error history), covering the following areas: |
| - | ControlGroup - status variables, general configuration, supplementary TFTP configuration data |
| - | SystemInfoGroup - system configuration and status |
| - | StatisticsGroup - statistic data on features |
| - | ErrorHistoryGroup - Error history in HiPath format Error messages are forwarded in the form of SNMP traps via the LAN to a specific external management application. The SNMP traps form the error history data structure (time stamp, error class, error description). |
| These components use the IP protocol according to OSI layer 3 and the UDP protocol according to layer 4. The SNMP protocol stack uses port numbers. The system supports the SNMP protocol version 1.0. |
SNMP Messages |
| The following commands control SNMP messages for communication between the SNMP management agent (HiPath 3000/5000) and external applications: |
| • | GET - retrieve data from agent |
| • | GET NEXT - read out data sequentially |
| • | SET - write data |
| • | TRAP - alarm messages issued by the SNMP agent |
| There is an integrated mechanism for generating SNMP traps in the event of class B errors. The SNMP management agent evaluates the error messages. In the case of defined errors, it generates specific traps and transmits them in the form of IP data records to a configurable IP address (a total of five SNMP V1.0-compatible applications are supported, including HP Open View Network Node Manager for example). |
13.10.2.3 |
Using SNMP |
| An MIB browser (available with Hewlett-Packard's "Network Node Managers") is required for using SNMP functionality. |
SNMP traps |
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| The following HG 1500-specific trap classes are available: |
| • | General traps |
| • | Reboot traps |
| • | Threshold/statistic, resource/diagnostic traps, |
| • | Security traps |
| • | License traps |
| • | Traps for internal errors |
| The following tables list the individual traps for each of these classes. A distinction is made under "Type" between hardware traps (HW) and software traps (SW). |
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| The weighting of the individual traps can vary depending on the severity of the event or error and is described by the following categories: |
| • | Cleared (problem already resolved) |
| • | Indeterminate (no classification possible) |
| • | Critical (critical error) |
| • | Major (major error) |
| • | Minor (minor error) |
| • | Warning (warning only) |
| • | Information (for information only) |
| General traps, such as MSG_GW_SUCCESSFULLY_STARTED, are sent as "information". |
| Reboot traps are always "critical", "major" or "minor" errors. |
| Threshold/resource traps occur as follows: When an event is received, the trap is sent as either "Warning", "Minor" or "Major". If the trap recurs, reminders are sent (at increasing intervals) with a weighting that is at least the same or higher than the initial trap. If the event was corrected (for example, "Link up" or sufficient RAM was provided), the trap is sent with the category "Cleared". |
SNMP Functions |
| The SNMP functions include: |
| • | With MIB browser and standard MIB (based on RFC1213): |
| - | querying and modifying standard MIB 2 parameters |
| • | With MIB browser and private MIB: |
| - | querying and modifying HG 1500's private MIB parameters |
| • | With HiPath 3000 Manager E: |
| - | defining communities of standard parameters (classes of service) |
| - | defining trap communities and stations to which the traps are sent |
| - | defining the trap level for various trap groups (error sensitivity) |
| • | With trap receiver: |
| - | receiving traps |
| MIBs also contain a brief commentary explaining the meaning of each parameter. |
| The following is a list of some parameters: |
| • | mgmt > mib-2 > system > sysUpTime: time since the last HG 1500 startup |
| • | mgmt->mib-2->ip->ipRouteTable: HG 1500 routing table |
| HG 1500 sends SNMP traps (diagnostic and error messages) to the stations configured under "SNMP > Trap Communities". These messages are transmitted in accordance with the severity levels set under "SNMP". |
| Examples of traps generated by HG 1500: |
| 1. | Generic traps (cannot be deactivated): |
| • | warm start |
| • | cold start |
| • | authentication failure |
| 2. | Enterprise traps (can be configured) |
| • | data init (WARNING - forced data reinitialization) |
| • | memory low (WARNING - memory resources below the threshold) |
| • | duplicate mac (MINOR - duplicated MAC address) |
| • | ip firewall (WARNING - IP firewall violation) |
| • | mac firewall (WARNING - MAC firewall violation) |
| • | isdn access (WARNING - ISDN access verification) |
| SNMP information can also be sent as e-mail to a mail address configured with the WBM. |
| HiPath 3000/5000 V9, Service Documentation, Issue 7 | up |
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| Disclaimer & Copyright | ID: P31003H3590S100017620 | 2012-06-25 |