JUNIPER AJER PDF

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AJER_a-R_SG - Ebook download as PDF File .pdf), Text File .txt) or read USA ciofreedopadkin.ga Course Number: EDU-JUN-AJER. Advanced Junos Enterprise Routing (AJER) is an advanced-level course. This four-day course is designed to provide students with the tools required for. Advanced Junos Enterprise Routing (AJER). Course No: EDU-JUN-AJER. Length: 4 Days. Schedule and Registration. Course Overview.


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Learning Portal Home > Advanced Junos Enterprise Routing (AJER) On- Demand Watch a Sneak Peek ยท Download Course Overview Flyer (PDF); For APAC. This course combines both Advanced Junos Enterprise Routing (AJER) and This course uses Juniper Networks SRX Series Services Gateways for the. Juniper SRX Series Services Gateways Advanced Junos Enterprise Routing ( AJER) Advanced Junos Enterprise Routing - Download PDF Download PDF.

Link-state type 1 byte : Encodes the specific LSA type. Each LSA type uses this field in a different manner. Link-state sequence number 4 bytes : Verifies that each router has the most recent version of an LSA. This field is incremented each time a new version is generated. This field is used to ensure data integrity in the LSDB. Length 2 bytes : The entire length of the individual LSA, including the header.

It is defined as having an area scope; therefore, it is not flooded across an area boundary.

In addition to the standard LSA header, the router LSA also contains the following fields: V, E, and B bits 1 byte : Following five bits set to a value of 0, the V, E, and B bits represent the characteristics of the originating router. The V bit is set when a virtual link is established. An ABR sets the B bit.

Reserved 1 byte : Reserved field. Value is always 0. Number of links 2 bytes : Gives the total number of links represented by the remaining six fields. Link ID 4 bytes : Represents the type of link the far end of the link is connected to. Link data 4 bytes : Represents what the near side of the link is connected to. Link type 1 byte : Describes the type of link.

Used with Link ID and Link data fields. Number of type of service ToS metrics 1 byte : Lists the number of type of service metrics encoded.

Only a value of 0 is supported. Metric 2 bytes : Contains the cost to transmit data out of the interface.

Advanced Junos Enterprise Routing Troubleshooting

Additional ToS data 4 bytes : This field is unused. OSPF Chapter www. The following link types are supported: Point-to-point Type 1 : On a point-to-point interface, an OSPF router always forms an adjacency with its peer over an unnumbered connection.

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As such, the link ID field contains the neighbors router ID. The link data field contains the IP address of the interface on the local router. Transit Type 2 : A connection to a broadcast segment is always noted as a transit link. The link data field contains the interface IP address of the local router.

Advertising a stub network occurs for the loopback interface and any passive interfaces. In addition, the IP subnet for any point-to-point interface is advertised as a stub because the adjacency was formed over an unnumbered interface.

Juniper JN0-647 Certification Exam Syllabus

The link ID field for a stub network contains the IP network number and the link data field contains the subnet mask. Once established, the virtual link appears in the Area 0 router LSA of each endpoint. The link ID field contains the neighbors router ID, and the link data field contains the interface IP address of the local router.

By using the keyword extensive, you can see each of the LSA fields.

We see this by the setting of bits 0x3. Bit position 8 0x1 is for the B bit, which is set when the originating router is an ABR. Combining these two fields results in a value of 0x3, which we see in the database capture. This router has three links connected to Area 0, which we can determine because of two factors.

First, the link count field is set to a value of 3. Second, the LSA is shown in the database within the Area 0. Recall that a router LSA has area scope, so a separate LSA is generated for each area representing the links only within that area. A single point-to-point link exists, and two links are connected to stub networks. This fact is clearly visible from the information in the type fields. This router LSA was originated by the same router from which the capture was taken.

Also note that the last line of the capture states that this LSA is Ours. The router LSA was installed 15 minutes and 47 seconds ago.

If not refreshed, the LSA will expire in 44 minutes and 13 seconds when its second maximum age is exceeded, and the LSA was last flooded 15 minutes and 47 seconds ago. These details are shown in the Installed, expires, and sent fields, and they are present for every LSA in the show ospf database extensive output. In addition to the standard LSA header, the network LSA also contains the following fields: Network mask 4 bytes : This field denotes the IP subnet mask for the interface connected to the broadcast network.

Attached router 4 bytes : This field is repeated for each router connected to the broadcast network. The value of each instance is the router ID of the attached routers. You can deduce the total number of routers listed by the length of the LSA.

This field lists the DRs IP address. Because only two instances of the attached router field are present, you can safely deduce that only two routers are connected to the link.

The router IDs of those two routers are Remember that all information is from the perspective of the We know of two routers within Area 0. In addition to the standard LSA header, the summary LSA also contains the following fields: Network mask 4 bytes : This field represents the subnet mask associated with the network advertised. Metric 3 bytes : This field provides the cost of the route to the network destination.

When the summary LSA is representing an aggregated route using the area-range command , this field is set to the largest current metric of the contributing routes. ToS 1 byte : This field describes any optional type of service information encoded within the network described.

The Junos OS does not use this field.

It is defined as having an area scope; therefore, it is not flooded across an area boundary. In addition to the standard LSA header, the router LSA also contains the following fields: V, E, and B bits 1 byte : Following five bits set to a value of 0, the V, E, and B bits represent the characteristics of the originating router.

The V bit is set when a virtual link is established.

An ABR sets the B bit. Reserved 1 byte : Reserved field. Value is always 0. Number of links 2 bytes : Gives the total number of links represented by the remaining six fields. Link ID 4 bytes : Represents the type of link the far end of the link is connected to.

Link data 4 bytes : Represents what the near side of the link is connected to. Link type 1 byte : Describes the type of link. Used with Link ID and Link data fields. Number of type of service ToS metrics 1 byte : Lists the number of type of service metrics encoded. Only a value of 0 is supported.

Metric 2 bytes : Contains the cost to transmit data out of the interface.

Additional ToS data 4 bytes : This field is unused. OSPF Chapter www. The following link types are supported: Point-to-point Type 1 : On a point-to-point interface, an OSPF router always forms an adjacency with its peer over an unnumbered connection. As such, the link ID field contains the neighbors router ID. The link data field contains the IP address of the interface on the local router.

Transit Type 2 : A connection to a broadcast segment is always noted as a transit link. The link data field contains the interface IP address of the local router. Advertising a stub network occurs for the loopback interface and any passive interfaces. In addition, the IP subnet for any point-to-point interface is advertised as a stub because the adjacency was formed over an unnumbered interface. The link ID field for a stub network contains the IP network number and the link data field contains the subnet mask.

Once established, the virtual link appears in the Area 0 router LSA of each endpoint. The link ID field contains the neighbors router ID, and the link data field contains the interface IP address of the local router. By using the keyword extensive, you can see each of the LSA fields.

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We see this by the setting of bits 0x3. Bit position 8 0x1 is for the B bit, which is set when the originating router is an ABR. Combining these two fields results in a value of 0x3, which we see in the database capture. This router has three links connected to Area 0, which we can determine because of two factors.

First, the link count field is set to a value of 3. Second, the LSA is shown in the database within the Area 0. Recall that a router LSA has area scope, so a separate LSA is generated for each area representing the links only within that area. A single point-to-point link exists, and two links are connected to stub networks. This fact is clearly visible from the information in the type fields.

This router LSA was originated by the same router from which the capture was taken. Also note that the last line of the capture states that this LSA is Ours. The router LSA was installed 15 minutes and 47 seconds ago.

If not refreshed, the LSA will expire in 44 minutes and 13 seconds when its second maximum age is exceeded, and the LSA was last flooded 15 minutes and 47 seconds ago. These details are shown in the Installed, expires, and sent fields, and they are present for every LSA in the show ospf database extensive output. In addition to the standard LSA header, the network LSA also contains the following fields: Network mask 4 bytes : This field denotes the IP subnet mask for the interface connected to the broadcast network.

Attached router 4 bytes : This field is repeated for each router connected to the broadcast network. The value of each instance is the router ID of the attached routers.

You can deduce the total number of routers listed by the length of the LSA. This field lists the DRs IP address. Because only two instances of the attached router field are present, you can safely deduce that only two routers are connected to the link. The router IDs of those two routers are Remember that all information is from the perspective of the We know of two routers within Area 0.

In addition to the standard LSA header, the summary LSA also contains the following fields: Network mask 4 bytes : This field represents the subnet mask associated with the network advertised. Metric 3 bytes : This field provides the cost of the route to the network destination. When the summary LSA is representing an aggregated route using the area-range command , this field is set to the largest current metric of the contributing routes.

ToS 1 byte : This field describes any optional type of service information encoded within the network described. The Junos OS does not use this field. ToS metric 3 bytes : This field is not used. You can gather some important details about the local router by closely examining the LSA: This router is an ABR because it contains a database for Area 0.

Within that area, three summary LSAs are listed. One of the LSAs the third one listed is from the router where the capture was taken. A second router in the backbone The two networks advertised by that ABR are Isolate different OSPF issues.

Identify scenarios that require routing policy or specific configuration options.

Use routing policy and specific configuration options to implement solutions for various scenarios. Explain the route selection process for BGP. Describe how to alter the route selection process. Configure some advanced options for BGP peers. Describe various BGP attributes in detail and explain the operation of those attributes.

Manipulate BGP attributes using routing policy. List common commands used to troubleshoot and verify BGP. Isolate different issues with BGP communication and configuration. Describe common routing policies used in the enterprise environment. Explain how attribute modifications affect routing decisions. Implement a routing policy for inbound and outbound traffic using BGP. Isolate problems relating to routing policy structure and configuration.Number of type of service ToS metrics 1 byte : Lists the number of type of service metrics encoded.

This maximum provides a mechanism for removing stale information from the database. Describe IP multicast traffic flow. The link-state ID is The slide graphically displays those flooding scopes. Value is always 0.

List the address ranges used for SSM.

Advanced Junos Enterprise Routing: Student Guide

Additional ToS data 4 bytes : This field is unused. The only difference between the two LSAs is in the use of the forwarding address field. Conceptually, it consists of multiple tuples in the form of: router ID, neighbor ID, cost.