PART $3$: CONNECTIVITY BETWEEN THE SITES

We now have connectivity between the devices connected to R$1$ and R$2.$ In this section, you will establish connectivity between the sites and configure OSPF to enable routing between the two networks.

$3\mathrm{.}1.$ Configure interfaces connecting R$1$ and R$2$

First, you will interconnect the routers R$1$ and R$2.$ Using the appropriate cable type, connect interface GigabitEthernet$0/1$ on one router to GigabitEthernet$0/1$ on the second router.

Next, allocate IP addresses to R$1$ and R$2.$

The network administrators assigned a network to be used for connectivity between the routers: $10\mathrm{.}0\mathrm{.}0\mathrm{.}0/30$

Configure the interfaces using the table below:

Device

Interfaces

IP Address

Description

R$1$

GigabitEthernet$0/1$

The first usable IP address on the $10\mathrm{.}0\mathrm{.}0\mathrm{.}0/30$ network

Connection to R$2$: Gi$0/1$

R$2$

GigabitEthernet$0/1$

The second usable IP address on the $10\mathrm{.}0\mathrm{.}0\mathrm{.}0/30$ network

Connection to R$1$: Gi$0/1$

Make sure both interfaces are not administratively down.

$3\mathrm{.}1\mathrm{.}1.$ Test connectivity

As an optional step, you can test connectivity between the devices. You should be able to ping between R$1$ and R$2,$ between devices at the main site and the annex, but not between the devices from the different sites. For example, you cannot ping PC$-$A from the Annex$-$PC$.$

If you run the show ip route command on one of the routers, you will notice that the routing table contains only the directly connected networks. You can configure static routers, but as the number of sites grows, the static routes will quickly become unmanageable.

Our next step is to configure OSPF.

$3\mathrm{.}2.$ Configure OSPF

In this section, you will configure OSPF on R$1$ and R$2$ using these parameters:

$$ Configure OSPF using process id $100($one hundred$)$

$$ Use router ID:

o R$1$: $1\mathrm{.}1\mathrm{.}1\mathrm{.}1$

o R$2$: $2\mathrm{.}2\mathrm{.}2\mathrm{.}2$

$$ Suppress routing OSPF updates on GigabitEthernet$0/0$ interface on both routers

o There is no point in sending OSPF updates over the Gi$0/0$ interface since there are no other routers to process them.

$$ Using the network command, add all directly connected networks to OSPF area $0$

o The network address and the wildcard mask must match the network subnet exactly.

$3\mathrm{.}3.$ Verify connectivity

By now, devices from both networks should be able to ping each other. Use ping, traceroute, and IOS commands to validate your connectivity; troubleshoot and correct any issues.PART $3$: CONNECTIVITY BETWEEN THE SITES

We now have connectivity between the devices connected to R$1$ and R$2.$ In this section, you will establish connectivity between the sites and configure OSPF to enable routing between the two networks.

$3\mathrm{.}1.$ Configure interfaces connecting R$1$ and R$2$

First, you will interconnect the routers R$1$ and R$2.$ Using the appropriate cable type, connect interface GigabitEthernet$0/1$ on one router to GigabitEthernet$0/1$ on the second router.

Next, allocate IP addresses to R$1$ and R$2.$

The network administrators assigned a network to be used for connectivity between the routers: $10\mathrm{.}0\mathrm{.}0\mathrm{.}0/30$

Configure the interfaces using the table below:

Device

Interfaces

IP Address

Description

R$1$

GigabitEthernet$0/1$

The first usable IP address on the $10\mathrm{.}0\mathrm{.}0\mathrm{.}0/30$ network

Connection to R$2$: Gi$0/1$

R$2$

GigabitEthernet$0/1$

The second usable IP address on the $10\mathrm{.}0\mathrm{.}0\mathrm{.}0/30$ network

Connection to R$1$: Gi$0/1$

Make sure both interfaces are not administratively down.

$3\mathrm{.}1\mathrm{.}1.$ Test connectivity

As an optional step, you can test connectivity between the devices. You should be able to ping between R$1$ and R$2,$ between devices at the main site and the annex, but not between the devices from the different sites. For example, you cannot ping PC$-$A from the Annex$-$PC$.$

If you run the show ip route command on one of the routers, you will notice that the routing table contains only the directly connected networks. You can configure static routers, but as the number of sites grows, the static routes will quickly become unmanageable.

Our next step is to configure OSPF.

$3\mathrm{.}2.$ Configure OSPF

In this section, you will configure OSPF on R$1$ and R$2$ using these parameters:

$$ Configure OSPF using process id $100($one hundred$)$

$$ Use router ID:

o R$1$: $1\mathrm{.}1\mathrm{.}1\mathrm{.}1$

o R$2$: $2\mathrm{.}2\mathrm{.}2\mathrm{.}2$

$$ Suppress routing OSPF updates on GigabitEthernet$0/0$ interface on both routers

o There is no point in sending OSPF updates over the Gi$0/0$ interface since there are no other routers to process them.

$$ Using the network command, add all directly connected networks to OSPF area $0$

o The network address and the wildcard mask must match the network subnet exactly.

$3\mathrm{.}3.$ Verify connectivity

By now, devices from both networks should be able to ping each other. Use ping, traceroute, and IOS commands to validate your connectivity; troubleshoot and correct any issues.