OSPF over Multipoint Frame Relay

Configuring Multipoint OSPF using Network type Point-to-Multipoint

R1#sh run
!
Output Omitted
!
interface FastEthernet0
 no ip address
 shutdown
 speed auto
!
interface Serial0
 no ip address
 encapsulation frame-relay
!
interface Serial0.1 multipoint
 ip address 10.2.123.1 255.255.255.248
 ip ospf network point-to-multipoint
 frame-relay interface-dlci 102
 frame-relay interface-dlci 103
!
end

R1#sh ip ospf neighbo

Neighbor ID     Pri   State           Dead Time   Address         Interface
3.3.3.3           0   FULL/  -        00:01:50    10.2.123.3      Serial0.1
2.2.2.2           0   FULL/  -        00:01:51    10.2.123.2      Serial0.1
R1#sh ip ospf interface s0.1
Serial0.1 is up, line protocol is up
  Internet Address 10.2.123.1/29, Area 0
  Process ID 1, Router ID 1.1.1.1, Network Type POINT_TO_MULTIPOINT, Cost: 64
  Transmit Delay is 1 sec, State POINT_TO_MULTIPOINT,
  Timer intervals configured, Hello 30, Dead 120, Wait 120, Retransmit 5
    oob-resync timeout 120
    Hello due in 00:00:13
  Index 1/1, flood queue length 0
  Next 0x0(0)/0x0(0)
  Last flood scan length is 1, maximum is 1
  Last flood scan time is 4 msec, maximum is 4 msec
  Neighbor Count is 2, Adjacent neighbor count is 2
    Adjacent with neighbor 3.3.3.3
    Adjacent with neighbor 2.2.2.2
  Suppress hello for 0 neighbor(s)
R1#

R2#sh run
!
Output Omitted
!
interface FastEthernet0
 no ip address
 shutdown
 speed auto
!
interface Serial0
 no ip address
 encapsulation frame-relay
!
interface Serial0.1 multipoint
 ip address 10.2.123.2 255.255.255.248
 ip ospf network point-to-multipoint
 frame-relay map ip 10.2.123.3 101 broadcast
 frame-relay interface-dlci 101
!
router ospf 1
 router-id 2.2.2.2
 log-adjacency-changes
 network 10.0.0.0 0.255.255.255 area 0
!
end

R2#sh ip ospf neig

Neighbor ID     Pri   State           Dead Time   Address         Interface
1.1.1.1           0   FULL/  -        00:01:54    10.2.123.1      Serial0.1
R2#sh ip ospf interface s0.1
Serial0.1 is up, line protocol is up
  Internet Address 10.2.123.2/29, Area 0
  Process ID 1, Router ID 2.2.2.2, Network Type POINT_TO_MULTIPOINT, Cost: 64
  Transmit Delay is 1 sec, State POINT_TO_MULTIPOINT,
  Timer intervals configured, Hello 30, Dead 120, Wait 120, Retransmit 5
    oob-resync timeout 120
    Hello due in 00:00:17
  Index 1/1, flood queue length 0
  Next 0x0(0)/0x0(0)
  Last flood scan length is 1, maximum is 1
  Last flood scan time is 4 msec, maximum is 4 msec
  Neighbor Count is 1, Adjacent neighbor count is 1
    Adjacent with neighbor 1.1.1.1
  Suppress hello for 0 neighbor(s)
R2#

R3#sh run
Building configuration...

Current configuration : 933 bytes
!
Output Omitted
!
interface Serial0
 no ip address
 encapsulation frame-relay
!
interface Serial0.1 multipoint
 ip address 10.2.123.3 255.255.255.248
 ip ospf network point-to-multipoint
 frame-relay map ip 10.2.123.2 101 broadcast
 frame-relay interface-dlci 101
!
router ospf 1
 router-id 3.3.3.3
 log-adjacency-changes
 network 10.0.0.0 0.255.255.255 area 0
!
end

R3#sh ip ospf neighbor

Neighbor ID     Pri   State           Dead Time   Address         Interface
1.1.1.1           0   FULL/  -        00:01:43    10.2.123.1      Serial0.1
R3#sh ip ospf interface s0.1
Serial0.1 is up, line protocol is up
  Internet Address 10.2.123.3/29, Area 0
  Process ID 1, Router ID 3.3.3.3, Network Type POINT_TO_MULTIPOINT, Cost: 64
  Transmit Delay is 1 sec, State POINT_TO_MULTIPOINT,
  Timer intervals configured, Hello 30, Dead 120, Wait 120, Retransmit 5
    oob-resync timeout 120
    Hello due in 00:00:07
  Index 1/1, flood queue length 0
  Next 0x0(0)/0x0(0)
  Last flood scan length is 1, maximum is 1
  Last flood scan time is 0 msec, maximum is 0 msec
  Neighbor Count is 1, Adjacent neighbor count is 1
    Adjacent with neighbor 1.1.1.1
  Suppress hello for 0 neighbor(s)
R3#

OSPF Virtual Link

An OSPF Virtual Link allow two backbone area connected trough each ABR. The two ABRs form a neighbor relationship through the same nonbackbone area with that virtual link, even when separated by many other routers and subnets.
Example, two Company want to connect they nonbackbone area respectively. It makes there are two backbone area exist, and OSPF requires that backbone area be contiguous. To solve this problem, we will configures a virtual link between ABRs C1 and C2. The virtual link exists inside area 0, making area 0 contiguous.

The two ABRs will send their LSDB to each others as a unicast packet over virtual link, —the other router in nonbackbone area just forward this packet— so that all routers in both parts of area 0 learn the routes from the other area 0.  In this concept, LSA mark the Do Not Age (DNA), meaning that all routers on the other side of the virtual link will not expects the LSAs to be reflooded over the virtual link on the usual 30 minutes refresh interval, it helps reduce overhead over the virtual link.

OSPF Route Filtering

Now i will post about ospf route filtering with filter-list and distribute-list. See the topology below and lets configure

i will share to you about all of routers configuration, this is a configuration without filtering. We will compare before and after route filtering happened. Ceck this out..

EIGRP Neighbors Authentication

R1 Configuration :

R1#sh run
output omitted
!
key chain pembajak
 key 1
  key-string elektro
 key 2
  key-string listrik
!
interface Serial0/0
 ip address 172.16.10.1 255.255.255.252
 ip authentication mode eigrp 100 md5
 ip authentication key-chain eigrp 100 pembajak
 clock rate 2000000
!
interface Serial0/1
 ip address 172.16.10.5 255.255.255.252
 ip authentication mode eigrp 100 md5
 ip authentication key-chain eigrp 100 pembajak
 clock rate 2000000
!
router eigrp 100
 network 172.16.10.0 0.0.0.3
 network 172.16.10.4 0.0.0.3
 network 192.168.1.1 0.0.0.0
 no auto-summary
 eigrp router-id 1.1.1.1
!
R1#

R2 Configuration :

R2#sh run
output omitted
!
interface Serial0/0
 ip address 172.16.10.2 255.255.255.252
 clock rate 2000000
!
interface Serial0/1
 ip address 172.16.10.9 255.255.255.252
 clock rate 2000000
!
router eigrp 100
 network 172.16.10.0 0.0.0.3
 network 172.16.10.8 0.0.0.3
 network 192.168.2.1 0.0.0.0
 no auto-summary
 eigrp router-id 2.2.2.2
!
R2#

R3 Configuration :

R3#sh run
!
key chain pembajak
 key 1
  key-string elektro
 key 2
  key-string listrik
!
interface Serial0/0
 ip address 172.16.10.6 255.255.255.252
 ip authentication mode eigrp 100 md5
 ip authentication key-chain eigrp 100 pembajak
 clock rate 2000000
!
interface Serial0/1
 ip address 172.16.10.10 255.255.255.252
 clock rate 2000000
!
router eigrp 100
 network 172.16.10.4 0.0.0.3
 network 172.16.10.8 0.0.0.3
 network 192.168.3.1 0.0.0.0
 no auto-summary
 eigrp router-id 3.3.3.3
R3#

Focuses on R2 configuration, there is no key chain config. With configuration above, eigrp on R1 just establish neighborship with R3 only. But R3 establish neighborship with R2 too because in interface s0/1 there is no ip authencation config. For verification, we can use :

• show ip route eigrp
• show ip eigrp neighbors
• show ip eigrp interface detail
• show key chain

 

Bicycle #1

Why the subject is “Bycicle #1″? Because this is my new hobby and this is a first post on this blog about bicycle. Seduced by seduction from my friends, makes me obsessed to know about it. Looking for more information on kaskus, sepedaku, and others; Damn, this is a more expensive hobby than mountaineer. But it’s look more safe and healthy if carried out intensively.

Currently there are many type of Bicycle, likes ; Mountain Bike(MTB), RoadRace, Hybrid, Fixie, Folding Bike, etc. MTB is my type (hehe  it’s make me always remember about mount). Then, I looking for MTB from online store. I get some type appropriate with my low budget . That are Polygon Premier 3.0, Wimcycle Hotrod 3.0, and United Venus. But i think, buy a second bicycle is more profitable. Therefor, I went to Bogor for met Deddy, yes He sale his bicycle.

Deddy's bike

Short stories, i buy his bike. Detail is ;

• Frame : Polygon Premier 14″ Alumunium
• Front & Rear Hub  : Hone
• RD : Hone
• FD : Alivio
• Rim : Alexrim double wall
• Front & Rear Brake : DiscBrake Shimano
• Fork : Lunch

My first “gowes” is a from bogor (Deddy’s place)to depok, with my friends Supri and Yosi via “jalur cikaret”. That’s a good trek i think.

Supri and Yosi

And now the question is “Mau gowes kemana kita?? “

Clear Computer RAM

Info yang cukup bagus, liat di kaskus dan coba saya share disini.

Mungkin bagi para master ini merupakan hal yang biasa, jadi tips ini buat yang belum biasa aja dech he..he..

Terkadang, komputer kita bakal menjadi lambat setelah beberapa lama dipakai. Apalagi kalo kita banyak menggunakan software yang berat2 seperti Adobe Photoshop, Corel Draw, Sony Soundforge dsb.

Biasanya setelah kita pakai aplikasi tersebut, komputer kita terasa lambat. Kemungkinan itu terjadi karena masih ada bekas data yang tersimpan dalam RAM, sehingga komputer kita pun jadi lambat. Salah satu cara untuk membersihkan RAM adalah dengan merestart komputer terlebih dahulu. Tapi kayanya ribet banget ya?