Network monitor juniper ex3300

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ACX show pfe filter hw summary. Display the TCAM resource usage errors for applications and stages egress, ingress, and pre-ingress.

Clears the TCAM resource usage error statistics for applications and stages egress, ingress, and pre-ingress. This section describes a use case where you can monitor and troubleshoot TCAM resources using show commands.

In this use case scenario, you have configured Layer 2 services and the Layer 2 service-related applications are using TCAM resources. The dynamic approach, as shown in this example, gives you the complete flexibility to manage TCAM resources on a need basis. Let us consider a scenario where there are services configured on the router. With this scale, all the applications are configured successfully and the status shows OK state.

To view the TCAM resource usage for all stages egress, ingress, and pre-ingress , use the show pfe tcam usage all-tcam-stages detail command. For example, add 20 more services on the router, thereby increasing the total number of services to After adding more services, you can check the status of the configuration by verifying either the syslog message using the command show log messages , or by running the show pfe tcam errors command. The following is a sample syslog message output showing the TCAM resource shortage for Ethernet-switching family filters for newer configurations by running the show log messages CLI command.

If you use the show pfe tcam errors all-tcam-stages detail CLI command to verify the status of the configuration, the output will be as shown below:.

The fw-l2-in application failed because of adding more number of services on the routers, which resulted in shortage of TCAM resources. Although other applications seems to work fine, it is recommended to deactivate or remove the newly added services so that the fw-l2-in application moves to an OK state.

After removing or deactivating the newly added services, you need to run the show pfe tcam usage and show pfe tcam error commands to verify that there are no more applications in failed state.

To view TCAM resource usage errors for all stages egress, ingress, and pre-ingress , use the show pfe tcam errors all-tcam-stages command. You can see that all the applications using the TCAM resources are in OK state and indicates that the hardware has been successfully configured. As shown in the example, you will need to run the show pfe tcam errors and show pfe tcam usage commands at each step to ensure that your configurations are valid and that the applications using TCAM resource are in OK state.

Therefore, the scale of the service depends upon the consumption of the TCAM resource by such applications. ACX and ACX routers support the use of a unified forwarding table to optimize address storage. This feature gives you the flexibility to configure your router to match the needs of your particular network environment. You can control the allocation of forwarding table memory available to store the following entries:.

You can use five predefined profiles l2-profile-one, l2-profile-two, l2-profile-three, l3-profile, lpm-profile to allocate the table memory space differently for each of these entries. You can configure and select the profiles that best suits your network environment needs. Table 4 illustrates the predefined profiles in the unified forwarding table and the respective table sizes. If the host table stores the maximum number of entries for any given type, the entire table is full and is unable to accommodate any entries of any other type.

The IPv4 multicast and IPv6 unicast addresses occupy double the space as that occupied by IPv4 unicast entries, and IPv6 multicast addresses occupy four times the space of the IPv4 unicast addresses. Table 5 shows the Layer 3 host table size for each profile. When unicast reverse-path forwarding unicast RPF is enabled, the table size reduces to half.

The number of entries reserved for these prefixes is configured in multiples of You can use five predefined profiles l2-profile-one, l2-profile-two, l2-profile-three, l3-profile, lpm-profile to allocate the table memory space.

When you configure and commit a profile, the Packet Forwarding Engine PFE process restarts and all the data interfaces on the router go down and come back up. The settings for l2-profile-three are configured by default. That is, if you do not configure the forwarding—options chassis profile-name statement, the l2-profile-three profile settings are configured.

View the TCAM resource usage errors for an application along with its other shared application. Help us improve your experience. Let us know what you think. Do you have time for a two-minute survey? Maybe Later. Meaning The ping results show the following information: Size of the ping response packet in bytes. IP address of the host from which the response was sent.

Time-to-live ttl hop-count value of the ping response packet. Number of ping requests probes sent to the host. Number of ping responses received from the host.

Packet loss percentage. Monitoring Traffic Through the Router or Switch To help with the diagnosis of a problem, display real-time statistics about the traffic passing through physical interfaces on the router or switch.

To display real-time statistics about physical interfaces, perform these tasks:. Meaning The sample output displays traffic data for active interfaces and the amount that each field has changed since the command started or since the counters were cleared by using the C key. N Display information about a different interface. I Freeze the display, halting the display of updated statistics. F Thaw the display, resuming the display of updated statistics.

T Clear zero the current delta counters since monitor interface was started. C Stop the monitor interface command. Note: The System-init filter which has the applications for Layer 2 and Layer 3 control protocols trap is essential for the overall system functionality.

Table 3: Show and Clear Commands to Monitor and Troubleshoot Dynamic TCAM Task Command Display the shared and the related applications for a particular application show pfe tcam app Display the TCAM resource usage for an application and stages egress, ingress, and pre-ingress show pfe tcam usage ACX show pfe filter hw summary Display the TCAM resource usage errors for applications and stages egress, ingress, and pre-ingress show pfe tcam errors Clears the TCAM resource usage error statistics for applications and stages egress, ingress, and pre-ingress clear pfe tcam-errors.

Multifield classifier with four terms to assign forwarding class and loss-priority. Viewing TCAM resource usage for all stages. Fixing the applications that have failed due to the shortage of TCAM resouces. Note: As shown in the example, you will need to run the show pfe tcam errors and show pfe tcam usage commands at each step to ensure that your configurations are valid and that the applications using TCAM resource are in OK state.

You can control the allocation of forwarding table memory available to store the following entries: MAC addresses Layer 3 host entries Longest prefix match LPM table entries You can use five predefined profiles l2-profile-one, l2-profile-two, l2-profile-three, l3-profile, lpm-profile to allocate the table memory space differently for each of these entries. Configuring the Unified Forwarding Table to Optimize Address Storage Using Profiles You can use five predefined profiles l2-profile-one, l2-profile-two, l2-profile-three, l3-profile, lpm-profile to allocate the table memory space.

Note: When you configure and commit a profile, the Packet Forwarding Engine PFE process restarts and all the data interfaces on the router go down and come back up. Freeze the display, halting the display of updated statistics.

Thaw the display, resuming the display of updated statistics. Stop the monitor interface command. Bridge domain vlan-map with swap tpid operation. Connectivity fault management implicit bridge-domain filters. Connectivity fault management implicit filters. Logical interface level fixed classifier. Circuit cross-connect family ingress firewall.

Family level egress firewall. Firewall filter-based forwarding. Firewall filter-based forwarding for inet6 family. Logical interface level ingress firewall.

Logical interface level egress firewall. Inet family ingress firewall on a forwarding-table. USM specifies authentication and encryption. VACM specifies access-control rules. USM uses the concept of a user for which security parameters levels of security, authentication, privacy protocols, and keys are configured for both the agent and the manager. Messages sent using USM are better protected than messages sent with community strings, where passwords are sent in the clear.

With USM, messages exchanged between the manager and the agent can have data integrity checking and data origin authentication. USM protects against message delays and message replays by using time indicators and request IDs. Encryption is also available. Based on the concept of applying security policies to the name of the groups querying the agent, the agent decides whether the group is allowed to view or change specific MIB objects.

VACM defines collections of data called views , groups of data users, and access statements that define which views a particular group of users can use for reading, writing, or receiving traps. Trap entries in SNMPv3 are created by configuring the notify, notify filter, target address, and target parameters. The notify statement specifies the type of notification trap and contains a single tag. The tag defines a set of target addresses to receive a trap. The notify filter defines access to a collection of trap object identifiers OIDs.

The target address defines a management application's address and other attributes to be used in sending notifications. Target parameters define the message processing and security parameters to be used in sending notifications to a particular management target. Configuring MIB Views. USM reduces messaging delays and message replays by enforcing timeout limits and by checking for duplicate message request IDs.

You define access privileges that you wish to extend to a group of one or more users. Access privileges are determined by the security model parameters usm , v1 , or v2 and security level parameters authentication , privacy , or none. For each security level, you must associate one MIB view for the group. Associating a MIB view with a group grants the read, write, or notify permission to a set of MIB objects for the group.

You configure security parameters for each user, including the username, authentication type and authentication password, and privacy type and privacy password. The username given to each user is in a format that is dependent on the security model configured for that user. To ensure messaging security, another type of username, called the security name, is included in the messaging data that is sent between the local SNMP server and the destination SNMP server.

Each user name is mapped to a security name, but the security name is in a format that is independent of the security model. The notify statement specifies the type of notification trap and contains a single tag that defines a set of target addresses to receive a trap. The target address defines the address of an SNMP management application and other attributes used in sending notifications.

Target parameters define the message processing and security parameters used in sending notifications to a particular target. The Junos MIB package is available in. You can download the appropriate format based on your requirements. You must follow the order specified in this procedure, and ensure that all standard MIBs are loaded before you load the enterprise-specific MIBs.

There might be dependencies that require a particular MIB to be present on the compiler before loading some other MIB. If you try to load mib-jnx-ping. Load mib-rfca. Some of the commands are:. The following example provides sample output from the show snmp health-monitor command:.

The following example provides sample output from the show snmp mib command:. The following example provides sample output from the show snmp statistics command:. This document presents the most frequently asked questions about the features and technologies used to implement SNMP services on Juniper Networks devices using the Junos operating system.

SNMP enables users to monitor network devices from a central location. The Junos OS includes an onboard SNMP agent that provides remote management applications with access to detailed information about the devices on the network. NMS — Acombination of hardware and software used to monitor and administer the network; network device that runs SNMP manager software.

Also referred to as an SNMP manager. The SNMP manager collects information about network connectivity, activity, and events by polling managed devices.

Various subagents reside on different modules of the Junos OS as well such as the Routing Engine , and these subagents are managed by the snmpd. The default port for SNMP queries is port The default port for SNMP traps and informs is port The port used for SNMP traps and informs is configurable, and you can configure your system to use ports other than the default port The only difference that might occur across platforms is MIB support.

SNMPv3 USM provides message security through data integrity, data origin authentication, message replay protection, and protection against disclosure of the message payload. When an SNMP manager receives an inform, it sends a response to the sender to verify receipt of the inform.

A management information base MIB is a table of definitions for managed objects in a network device. MIBs are used by SNMP to maintain standard definitions of all of the components and their operating conditions within a network device.

There might be dependencies that require a particular standard MIB to be present on the compiler before loading a particular enterprise-specific MIB.

Download the format appropriate for your requirements. Decompress the file. Refer to the relevant release documentation for a list of MIBs that are supported. Some MIBs are supported only by functionalities on specific platforms. How can I determine if a MIB is supported on a platform? How can I determine which MIBs are supported by a device?

One reason could be that the MIB itself is unresponsive. Possible reasons for this issue include network issues, an incorrect community configuration, an incorrect SNMP configuration, and so on. Check the traceoptions output to see if there are any errors. The enterprise branch number for Junos OS is The Chassis MIB jnxchassis. It provides information about the router and its components. The Chassis MIB objects represent each component and its status.

The ifIndex is persistent when reboots occur if the Junos OS version remains the same, meaning the values assigned to the interfaces in the ifIndex do not change.

When there is a software upgrade, the device tries to keep the ifIndex persistent on a best effort basis. For Junos OS Release However, remote monitoring version 2 RMON 2 is not supported. Yes, you can use SNMP to determine the health of the Routing Engine processes by configuring the health monitoring feature. This often requires device-specific expertise and customizing the monitoring application.

Additionally, some MIB object instances that need monitoring are set only at initialization, or they change at runtime and cannot be configured in advance. To address these issues, the health monitor extends the RMON alarm infrastructure to provide predefined monitoring for a selected set of object instances, such as file system usage, CPU usage, and memory usage, and includes support for unknown or dynamic object instances, such as Junos OS software processes.

To display the health monitoring configuration, use the show snmp health-monitor command:. When you configure the health monitor, monitoring information for certain object instances is available, as shown in Table 1. The index values assigned to the Routing Engines depend on whether the Chassis MIB uses a zero-based or a ones-based indexing scheme.

Because the indexing scheme is configurable, the correct index is determined whenever the router is initialized and when there is a configuration change. If the router or switch has only one Routing Engine, the alarm entry monitoring RE1 is removed after five failed attempts to obtain the CPU value.

Because the indexing of this object is identical to that used for jnxOperatingCPU, index values are adjusted depending on the indexing scheme used in the Chassis MIB. Multiple instances of the same process are monitored and indexed separately.

Monitors the memory usage for each Junos OS software process. As of Junos OS Release 9. Yes, SNMP has backward compatibility, meaning that all three versions can be enabled simultaneously. Yes, you can filter specific SNMP queries on a device using exclude and include statements.

The following example shows a configuration that blocks read-write operation on all OIDs under. Several examples are included here. The following example shows the configuration of the Routing Engines in a dual Routing Engine device.

A sample traceoptions configuration might look like this:. When the traceoptions flag all statement is included at the [edit snmp] hierarchy level, the following log files are created:. It provides authentication and encryption of data. Enhanced security is important for managing devices at remote sites from the management stations. Is this normal behavior? Yes, this is the expected behavior.

However, if both routing engines have the same engine ID and the routing engine with lesser snmpEngineBoots value is selected as the primary routing engine during the switchover process, the snmpEngineBoots value of the primary routing engine is synchronized with the snmpEngineBoots value of the other routing engine.

I see the configuration of informs under the [edit snmp v3] hierarchy. Informs can be used with SNMPv2c. The following example shows the basic configuration for SNMPv3 informs on a device note that the authentication and privacy is set to none :. This section presents frequently asked questions and answers related to how SNMP interacts with Juniper Networks devices.

How frequently should a device be polled? What is a good polling rate? It is difficult to give an absolute number for the rate of SNMP polls per second since the rate depends on the following two factors:. Because the Packet Forwarding Engine load can vary for each system, there is greater variation in how frequently a device should be polled. Frequent polling of a large number of counters, especially statistics, can impact the device. We recommend the following optimization on the SNMP managers:.

One way to determine a rate limit is to note an increase in the Currently Active count from the show snmp statistics extensive command.

The following is a sample output of the show snmp statistics extensive command:. This enables the SNMP process to send traps. I am unable to perform a MIB walk on the ifIndex. Why is this? Any variable bindings or values with an access level of not-accessible cannot be queried directly because they are part of other variable bindings in the SNMP MIB table. The ifIndex has an access level of not-accessible. Therefore, it cannot be accessed directly because it is part of the variable bindings.

However, the ifIndex can be accessed indirectly through the variable bindings. Is this acceptable? If all the processes come up successfully and the SNMP operations are working properly, then these messages can be ignored. Can this be configured? The source IP address cannot be configured for responses. It can only be configured for traps.

This section presents frequently asked questions and answers related to SNMP traps and informs. The Junos OS implements a trap-queuing mechanism to limit the number of traps that are generated and sent. If a trap delivery fails, the trap is added back to the queue, and the delivery attempt counter and the next delivery attempt timer for the queue are reset.

Subsequent attempts occur at progressive intervals of 1, 2, 4, and 8 minutes. After 10 unsuccessful attempts, the destination queue and all traps in the queue are deleted. Junos OS also has a throttle threshold mechanism to control the number of traps sent default traps during a particular throttle interval default 5 seconds.

This helps ensure consistency in trap traffic, especially when a large number of traps are generated due to interface status changes. The throttle interval begins when the first trap arrives at the throttle. All traps within the throttle threshold value are processed, and traps exceeding the threshold value are queued.

The maximum size of all trap queues the throttle queue and the destination queue is 40, traps. The maximum size of any one queue is 20, traps. When a trap is added to the throttle queue, or if the throttle queue has exceeded the maximum size, the trap is moved to the top of the destination queue.

Further attempts to send the trap from the destination queue are stopped for a second period, after which the destination queue restarts sending the traps. For the Juniper Networks EX Series Ethernet Switch, the maximum size of all trap queues the throttle queue and the destination queue is 1, traps.

The maximum size for any one queue on the EX Series is traps. I did not see a trap when I had a syslog entry with a critical severity. Is this normal?

Can it be changed? Not every syslog entry with critical severity is a trap. However, you can convert any syslog entry to a trap using the event-options statement. Traps and informs can be filtered based on the trap category and the object identifier. You can specify categories of traps to receive per host by using the categories statement at the [edit snmp trap-group trap-group ] hierarchy level. Use this option when you want to monitor only specific modules of the Junos OS.

The following example shows a sample configuration for receiving only link , vrrp-events , services , and otn-alarms traps:. The Junos OS also has a more advanced filter option notify-filter for filtering specific traps or a group of traps based on their object identifiers.

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