مساعدة ospf network types

[ahmed fci]

انا جديد في الشبكات اتمني مساعدتكم ............. ما هو المقصود بال ospf network types هل هو الشبكات التي تدعم بروتوكول ospf

[ahmed fci]

اتمني تساعدوني

[alialmhdi]

ما هو المقصود بال ospf network types هل هو الشبكات التي تدعم بروتوكول ospf


OSPF Network Types

سوف اشرح لك بدون ترتيب
انت تعرف ان الـ OSPF Protocol يعرف 6 انوع من الشبكات ولتسهيل الفهم انظر معي
اذا اردنا تشغيل الـ OSPF على روترين موصلات بكلا من

1- Ethernet
فان نوع الشبكه افترضياَ من وجه نظر الـ OSPF هي Broadcast Network
وفيها

Will elect a DR and a BDR.
Uses the multicast MAC 224.0.0.5 (0100.5E00.0005) for All OSPF Routers and 224.0.0.6 (0100.5E00.0006) for DR .
There is NO next-hop modification. The next-hop IP remains that of the originating router.
Layer3 to layer2 resolution is required.
Broadcast networks can’t have unicast neighbors configured.
10 hello / 40 dead-interval.


2- multipoint frame-relay
فان نوع الشبكه افترضياَ من وجه نظر الـ OSPF هي Non-Broadcast Network
وفيها


elect a DR and BDR, but all OSPF packets are unicast between each manually specified neighbor with the "neighbor" command.
The next-hop IP is not changed and remains the IP address of the originating router.
The default priority is 1, and should be disabled (=0) on ALL SPOKES, to prevent a spoke from becoming a blackhole DR/BDR.
30 hello / 120 dead-interval.



3- T1, DS-3, or SONET links, point-to-point sub-interface on frame-relay and ATM networks



فان نوع الشبكه افترضياَ من وجه نظر الـ OSPF هي Point -to-Point Networks
وفيها
NO DR/BDR election, OSPF configured as per normal.
Uses the multicast destination to AllSPFRouters (224.0.0.5), except for retransmitted LSAs which are unicast.
The next-hop IP is that of the advertising router.
OSPF ignores subnet mask mismatch on point-to-point links.
10 hello / 40 dead-interval.



4- frame-relay Cisco proprietary
فان نوع الشبكه ليس افترضياَ من وجه نظر الـ OSPF هي Point-to-multipoint networks
وفيها



Does not elect a DR and BDR, and the OSPF packets are multicast (224.0.0.5) to each known neighbor.
Are special configurations of NBMA networks in which the networks are treated as a collection of point-to-point links.
The next-hop IP is that of the advertising neighbor.
Layer3 to layer2 resolution is ONLY needed for the directly connected neighbors.
Non-direct neighbors use recursive layer3 IP routing to reach each other.
In addition the endpoints of point-to-multipoint networks are advertised as host routes instead of the actual networks. ie /32 in the routing table.
30 hello / 120 dead-interval.

5 - frame-relay Cisco proprietary
فان نوع الشبكه ليس افترضياَ من وجه نظر الـ OSPF هي Point-to-multipoint non-broadcast networks
وفيها
No DR/BDR election, uses unicast appose to multicast, to each manually specified neighbor.
the same as point-to-multipoint, but configured with the additional 'non-broadcast' keyword.

As a result the directly connected neighbor must be manually defined with the 'neighbor' command.
This command is only required on the one side
The next-hop IP is that of the advertising neighbor.
IP routing will be used to establish reachability between devices that are non-adjacent at layer2.


يمكن ان تكون نوع الشكه في كلا النيبر كما يلي :-






Broadcast to Broadcast
Non-Broadcast to Non-Broadcast
Point-to-Point to Point-to-Point
Point-to-Multipoint to Point-to-Multipoint
( بتعديل Broadcast to Non-Broadcast ( hello/dead timers
( بتعديل Point-to-Point to Point-to-Multipoint ( hello/dead timers

[ahmed fci]

اشكرك اخ alialmhdi ولكن اطلب منك هل يوجد انواع اخري للشبكات وماهي الشبكات التي لايفهمهما ospf

[alialmhdi]

هل يوجد انواع اخري للشبكات وماهي الشبكات التي لايفهمهما ospf


نعم لم يتبقى الا التالي

1- Virtual links
The virtual link will transition to the fully functional point-to-point interface state when a route to
the neighbouring ABR is found in the route table.

يجب الا تكون Stub Area واذا لا بد فان الحل في استخدام

2- OSPF over GRE

3- loopback networks
فان نوع الشبكه افترضياَ من وجه نظر الـ OSPF هي Loopback Networks


حسب علمي لا يوجد شبكه لا يدعمها OSPF PROTOCOL

[therock_1234]

مشكور اخ علي المهدي علي هذا الشرح الوافي

[westwind]

هذا تلخيص للأمتحان من الدرافت ديالي. الجدول مع شكل كل نوع
https://www.9awr.com/upfiles/is817241.jpg (https://www.9awr.com/)