OSPF Default Route on Juniper

Juniper, OSPF, Topology, rjlogs, GNS3, Junos

Continue the previous post “Configure OSPF on Juniper” , now we will configure the default route.

The scenario is IP loopback interface of J1 (1.1.1.1/32) will not advertised through OSPF, but J2 and J3 will reach it through the default route that injected into OSPF.

First of all, remove the loopback interface of J1 from OSPF :

[edit]
root@J1# edit protocols ospf area 0

[edit protocols ospf area 0.0.0.0]
root@J1# delete interface lo0.0

Continue reading “OSPF Default Route on Juniper”

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OSPF Virtual Link

In OSPF Multi Area, all area must be connected to the backbone area (area 0), in order to communicate each other. Inter area routing will through the backbone area (area 0). If there’s area that isn’t connected to the backbone area we can setup a virtual link.

OSPF, Virtual Link, Cisco, Routing Protocol, GNS3

Based on topology above, area 2 doesn’t have connection/route to other area, since it’s not connected to the backbone area (area 0).

In this case, we can setup a Virtual Link from R4 to R2 and vice versa, from R2 to R4.

Continue reading “OSPF Virtual Link”

Configuring an EtherChannel Link

etherchannel

Here’s an example of EtherChannel configuration.

SW1 SW2
Port fa0/21 to port fa0/21 SW2 Port fa0/21 to port fa0/21 SW1
Port fa0/22 to port fa0/22 SW2 Port fa0/22 to port fa0/22 SW1
Port fa0/23 to port fa0/23 SW2 Port fa0/23 to port fa0/23 SW1
Port fa0/24 to port fa0/24 SW2 Port fa0/24 to port fa0/24 SW1
Port fa0/1 to PC1 Port fa0/1 to PC3
Port fa0/2 to PC2 Port fa0/2 to PC4

PC1 : 10.10.10.1/24 – VLAN 10
PC2 : 10.10.20.1/24 – VLAN 20
PC3 : 10.10.10.2/24 – VLAN 10
PC4 : 10.10.20.2/24 – VLAN 20

Continue reading “Configuring an EtherChannel Link”