H3C-L4RDT-MIB

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Organization: Huawei 3Com Tech, Inc.

Last Updated: 2004-09-21

Category: Vendor: H3C/HH3C

Description: H3C MIB for Layer 4 redirect management routing specific application flows to service appliances or servers.

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What Is H3C-L4RDT-MIB?

H3C-L4RDT-MIB is a Huawei-3Com (H3C) proprietary MIB managing Layer 4 redirection, a feature that transparently redirects matching client traffic (by IP/port/VLAN) to a different destination, commonly used for captive-portal or load-balancing scenarios. Its redirect-cache table, keyed by client IP, records redirection status, destination port, MAC address, VLAN, and TCP port, alongside a separate IP-exclusion table for addresses exempted from redirection. As a configuration/software-status MIB it lets an administrator confirm which client sessions are currently being redirected and verify exclusion entries are correctly configured. It is deployed on H3C (Huawei-3Com) switches using Layer 4 redirection. Engineers can download the H3C-L4RDT-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in H3C-L4RDT-MIB. Use the built-in SNMP Monitoring Browser to explore available variables, view their current values and descriptions, and select the objects you want to monitor. You can then create SNMP monitors, configure thresholds, and receive alerts when monitored values change.

Supported Devices

H3C (Huawei-3Com) switches

Monitoring Examples

An administrator checks h3cL4RedirectCacheRedirectionStatus for a client reporting unexpected redirection to confirm whether its address should actually be in h3cL4RedirectIpExclusionTable.

What Can Be Monitored

per-client redirection status
IP exclusion list

Imported Objects

From HUAWEI-3COM-OID-MIB

h3cCommon

OBJECT-IDENTITY

From SNMPv2-CONF

MODULE-COMPLIANCE
NOTIFICATION-GROUP
OBJECT-GROUP

From SNMPv2-SMI

Gauge32
Integer32
MODULE-IDENTITY
NOTIFICATION-TYPE
OBJECT-TYPE

From SNMPv2-TC

DisplayString
MacAddress
RowStatus
TEXTUAL-CONVENTION
TruthValue

How to Use in IPNetwork Monitor

Example using h3cL4RedirectFreeCacheEntries OID:

Select an H3C switch (Layer 4 traffic redirection) as the target host to create a monitor — the SNMP service should be up and running on it. Click New Monitor, then check SNMP Custom on the Favorites tab, click Next, and confirm the host. On the next page, click Select... to open the built-in SNMP MIB Browser and type h3cL4RedirectFreeCacheEntries into the Find box to locate it in the OID tree, then select it and click OK. This object indicates the number of entries that may still be added to the h3cL4RedirectCacheTable. On the monitor's Main parameters page you can set the target's SNMP port (default 161), credentials, polling interval, and other settings — see the SNMP Monitor help for details. On the State conditions and Alerting tabs, configure when the monitor should change state and trigger an alert; since this is an INTEGER-type OID, Value bounds is the most useful condition here — trigger an alert if the count changes from its expected baseline, since that would indicate the underlying set of items changed unexpectedly. Click Finish to create the monitor; you can adjust any parameter later.

OIDs

OID symbolic	OID numeric	Type	Access	Description
h3cL4Redirect	1.3.6.1.4.1.2011.10.2.10			See description above
h3cL4RedirectCacheTable	1.3.6.1.4.1.2011.10.2.10.1		not-accessible	This table contains an entry for each Web Cache device that this unit is aware of.
h3cL4RedirectCacheEntry	1.3.6.1.4.1.2011.10.2.10.1.1		not-accessible	Each row specifies a known Web Cache device.
IP h3cL4RedirectCacheIpAddress	1.3.6.1.4.1.2011.10.2.10.1.1.1	IpAddress	not-accessible	This object specifies the IP address of the Web Cache device.
INT h3cL4RedirectCacheRedirectionStatus	1.3.6.1.4.1.2011.10.2.10.1.1.2	INTEGER	read-only	This object returns the current state of traffic redirection to the cache. If redirection is disabled, this object shall return disabledNotRedirecting(1). If a unit cannot be selected to perform the cache health check, this object shall return enabledNoHealthChecker(2). If the software is determining if the cache is able to do redirection(this will happen when the redirection state transitions from disabled to enabled), this object shall return enabledHealthChecking(3). If the cache health check succeeded but the hardware is unable to support redirection to the cache port, this object shall return enabledHealthCheckOKNotRedirecting(4). If the latest health check of the cache has failed, this object shall return enabledHealthCheckFailed(5). If the cache is in use and traffic is being redirected to it, this object shall return enabledRedirecting(6). The default value is disabledNotRedirecting(1).
INT h3cL4RedirectCachePort	1.3.6.1.4.1.2011.10.2.10.1.1.3	INTEGER	read-create	This object stores the ifIndex that identifies the port or link aggregation which provides the connection that leads to the cache. If only manual cache configuration is supported, this value must be supplied. The method of cache configuration can be ascertained by the presence or absence of the L4 manual cache configuration id within the 3com-352 MIB. The default value is 0.
ROW h3cL4RedirectCacheRowStatus	1.3.6.1.4.1.2011.10.2.10.1.1.4	RowStatus	read-create	This object is used to create and remove Web Cache entries. The following are the valid values that may be written to RowStatus: Writing createAndGo(4) to the RowStatus of a non-existent row shall create a row with default values and shall set the row to active(1). If the row already exists, it shall be an error. Writing createAndWait(5) to the RowStatus of a non-existent row shall create a row with default values and shall set the row to notInService(2). If the row already exists, it shall be an error. Writing active(1) to the RowStatus of an existing row shall change the value of that row to active(1). Writing active(1) to the RowStatus of an existing row that is already active(1) shall not cause an error, the row shall remain active(1). If the row does not exist, it shall be an error. Writing notInService(2) to the RowStatus of an existing row shall change the value of that row to notInService(2). Writing notInService(2) to the RowStatus of an existing row that is already notInService(2) shall not cause an error, the row shall remain notInService(2). If the row does not exist, it shall be an error. Writing destroy(6) to the RowStatus of a non-existent row shall be an error. If the row exists, it shall be removed. Writing notReady(3) to the RowStatus of a non-existent row or to an existent row shall be an error. If the user does not supply values for the necessary objects, default values will be supplied. Attempts to create more entries than the hardware can support shall be rejected.
MAC h3cL4RedirectCacheMacAddress	1.3.6.1.4.1.2011.10.2.10.1.1.5	MacAddress	read-create	This object defines the MAC address of the attached Web cache device. If only manual configuration of the cache is supported, this value must be supplied. The method of cache configuration can be ascertained by the presence or absence of the L4 manual cache configuration id within the 3com-352 MIB. The default value is 0.
INT h3cL4RedirectCacheVlan	1.3.6.1.4.1.2011.10.2.10.1.1.6	INTEGER	read-create	This object specifies the VLAN which the cache port belongs to.
INT h3cL4RedirectCacheTcpPort	1.3.6.1.4.1.2011.10.2.10.1.1.7	INTEGER	read-create	This object specifies the TCP port number that is being redirected
h3cL4RedirectIpExclusionTable	1.3.6.1.4.1.2011.10.2.10.2		not-accessible	This table lists the IP addresses and subnetworks that Web Cache redirection is not supported for. Some devices may not support addition to this table.
h3cL4RedirectIpExclusionEntry	1.3.6.1.4.1.2011.10.2.10.2.1		not-accessible	Each row contains an IP address or a IP subnetwork that is being excluded from the redirection.
IP h3cL4RedirectIpExclusionIpAddress	1.3.6.1.4.1.2011.10.2.10.2.1.1	IpAddress	not-accessible	This object specifies the IP address or the subnetwork address that is to be excluded.
INT h3cL4RedirectIpExclusionMaskLen	1.3.6.1.4.1.2011.10.2.10.2.1.2	INTEGER	read-create	This object provides the number of bits in the subnetwork mask. This mask shall be applied to the excludeIP address to determine the subnetwork that is to be excluded. A value of 32 implies that the excludeIP address refers to an individual host. The default value is 32.
ROW h3cL4RedirectIpExclusionRowStatus	1.3.6.1.4.1.2011.10.2.10.2.1.3	RowStatus	read-create	This object is used to add rows to the Exclusion Table. The following are the valid values that may be written to RowStatus: Writing createAndGo(4) to the RowStatus of a non-existent row shall create a new row. The new row shall be active(1). If the row exists, it shall be an error. Writing createAndWait(5) to the RowStatus of a non-existent row or to an existent row shall be an error. Writing active(1) to the RowStatus of an existing row shall change the value of that row to active(1). Writing active(1) to the RowStatus of an existing row that is already active(1) shall not cause an error, the row shall remain active(1). If the row does not exist, it shall be an error. Writing notInService(2) to the RowStatus of an existing row shall change the value of that row to notInService(2). Writing notInService(2) to the RowStatus of an existing row that is already notInService(2) shall not cause an error, the row shall remain notInService(2). If the row does not exist, it shall be an error. Writing destroy(6) to the RowStatus of a non-existent row shall be an error. If the row exists, it shall be removed. Writing notReady(3) to the RowStatus of a non-existent row or to an existent row shall be an error. Attempts to create more entries than the hardware can support shall be rejected.
h3cL4RedirectVlanTable	1.3.6.1.4.1.2011.10.2.10.3		not-accessible	This table contains a row for each VLAN of the packet which need to be redirected to the Web cache.
h3cL4RedirectVlanEntry	1.3.6.1.4.1.2011.10.2.10.3.1		not-accessible	Each row specifies a VLAN of the packet which need to be redirected to the Web cache.
INT h3cL4RedirectVlanID	1.3.6.1.4.1.2011.10.2.10.3.1.1	INTEGER	not-accessible	This object specifies the VLAN ID of the packet which need to be redirected to the Web cache.
ROW h3cL4RedirectVlanRowStatus	1.3.6.1.4.1.2011.10.2.10.3.1.2	RowStatus	read-create	This object allows ports to be added and removed from the table. The following are the valid values that may be written to RowStatus: Writing createAndGo(4) to the RowStatus of a non-existent row shall create a new row. The new row shall be active(1). If the row exists, it shall be an error. Writing createAndWait(5) to the RowStatus of a non-existent row or to an existent row shall be an error. Writing active(1) to the RowStatus of an existing row shall change the value of that row to active(1). Writing active(1) to the RowStatus of an existing row that is already active(1) shall not cause an error, the row shall remain active(1). If the row does not exist, it shall be an error. Writing notInService(2) to the RowStatus of a non-existent row or to an existent row shall be an error. Writing destroy(6) to the RowStatus of a non-existent row shall be an error. If the row exists, it shall be removed. Writing notReady(3) to the RowStatus of a non-existent row or to an existent row shall be an error. Attempts to create more entries than the hardware can support shall be rejected.
STR h3cL4RedirectInformationString	1.3.6.1.4.1.2011.10.2.10.4	DisplayString	read-only	This object shall contain the string generated as a result of a Layer 4 Redirection configuration. It shall contain either a string describing successful configuration or a string describing unsuccessful configuration. This length of this string shall be no longer than 80 characters.
INT h3cL4RedirectFreeCacheEntriesEx	1.3.6.1.4.1.2011.10.2.10.5	INTEGER	read-only	This object indicates the number of entries that may still be added to the h3cL4RedirectCacheTable.
INT h3cL4RedirectFreeIpExclusionEntries	1.3.6.1.4.1.2011.10.2.10.6	INTEGER	read-only	This object indicates the number of entries that may still be added to the h3cL4RedirectIpExclusionTable.
INT h3cL4RedirectFreeVlanEntries	1.3.6.1.4.1.2011.10.2.10.7	INTEGER	read-only	This object indicates the number of entries that may still be added to the h3cL4RedirectVlanTable.

RFC description

Manages Layer 4 traffic redirection to web caches including cache configuration, IP exclusion rules, and VLAN routing.

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Download H3C-L4RDT-MIB