Skip to main content

Routing Protocol working layer

BGP is an application layer protocol because it uses TCP to transport its messages,
and RIP because it uses UDP for same purposes.
Other routing protocols such as OSPF are said to operate at the internet layer because they 
encapsulate their messages directly into IP packets.

 Ref : Jeff Doyle (Routing TCP/IP volume 1)


Comments

Post a Comment

Popular posts from this blog

Access-list at SVI

SVI (Switch Virtual Interfaces) We use the SVI for inter vlan routing. In this scenario I will configure the access list with SVI. In this scenario I want to permit vlan 10 network to vlan 50 Server farm. Vlan 10 and vlan 20 can communicate each other. First create vlan and then interface vlan#. Switch(config)#vlan 10 Switch(config)#interface vlan 10 Switch(config-if)#ip address 192.168.10.254 255.255.255.0 Switch(config)#vlan 20 Switch(config)#interface vlan 20 Switch(config-if)#ip address 192.168.20.254 255.255.255.0 Switch(config)#vlan 50 Switch(config)#interface vlan 50 Switch(config-if)#ip address 192.168.50.254 255.255.255.0 when we finish the vlan interface create make sure the switch port are belong to each vlan. Port to vlan assign configure is Switch(config)#interface g0/1 Switch(config-if)#switchport access vlan 10 Switch(config)#interface g0/2 Switch(config-if)#switchport access vlan 20 Switch(config)#int...
1 comment
Read more

OSPF Stub

The following restrictions apply to stub areas:     You cannot create a virtual link through a stub area.   A stub area cannot contain an AS boundary router.   You cannot configure the backbone as a stub area.   You cannot configure an area as both a stub area and an not-so-stubby area (NSSA). Ref : Juniper.net
Post a Comment
Read more

OSPF Virtual Link

OSPF Virtual Link OSPF virtual link is use for that area far from backbone area 0. At this figure 1.1 area 2 is far from area 0 so area 2 can't reach other area. Figure 1.1 After configure OSPF, neighbor is up but router 2 don't see 3.3.3.0/24 network. R3#sh ip ospf nei Neighbor ID     Pri   State           Dead Time   Address         Interface 2.2.2.2           1   FULL/DR         00:00:39    10.1.2.1        FastEthernet0/0 R2#sh ip route      10.0.0.0/30 is subnetted, 2 subnets C       10.1.2.0 is directly connected, FastEthernet1/0 C       10.1.1.0 is directly connected, FastEthernet0/0 One of OSPF rule all area must connect to area 0.In this cause we can use virtual link at area 1. R2 router ospf 1  router-id 2.2.2.2  log-adjace...
Post a Comment
Read more