11-13-2019 03:32 PM
The router in green has the following commands (to allow internet access to the vlans):
Each vlan has: ip nat inside
Then, the router has a list of the vlans created:
ip access-list standard MIS-REDES
permit 202.50.100.0 0.0.0.255 <----vlan 100
permit 202.50.120.0 0.0.0.255 <----vlan 120
permit 202.50.140.0 0.0.0.255 <----vlan 140
exit
And then, we added the net interface:
ip nat inside source list MIS-REDES interface fa0/0 overload <----interfaz fa0/0
All vlans in the green area can access internet without any problem.
But in the blue section we have the second router (connected to the first one), which has internet. But when I added the vlans to this router, they do not have internet access. I tried using the same commands as in the first router, but unsuccessfully.
How can the vlans for the second router get internet access?
Does anyone know if the commands have to be different?
11-13-2019 04:11 PM
To all concerned,
It is very clear this thread is school work.
Help the students learn: Post the links to documents and configuration guides.
Please refrain from handing out answers.
11-13-2019 05:55 PM
Hi @PuckaB17
Things to keep in mind:
-Only the border router should perform NAT.
-As the border router needs a default route to route packets to unknown destinations, other routers also need a default route to know where to send packets to an unknown destination.
-All internal interfaces of the border router must be indicated as ip nat inside.
-The border router must have a route to internal destinations, whether you learn them by a routing protocol or by static routes.
Check those parameters and let us know if they work for you.
Regards
11-23-2019 11:38 AM
Hi PuckaB17,
As per Topology shown-
Router 2-Router Anexo 2911---(has no internet on vlan, which is your problem to be solved?)--blue section
Router 1- UnADM ---has an internet--Green Section
Solution:
Layer 1 issue- Serial Connection is not configured properly - PPP connection required
Layer 2 issue- PPP connection w/Clock rate setting i.e. 56000 is required
Layer 3 issue- missing configuration on Rourter 1/ Router 2 on Advertising Internet traffic via Routing Protocol In RIP,
router 1
router rip
network 202.50.50.0 255.255.255.0 <----Internet interface
network 202.50.140.0 255.255.255.0 <----vlan 140
network 202.50.120.0 255.255.255.0 <----vlan 120
network 8.0.0.0 255.0.0.0 <----WAN Network between R1 and R2
router 2
router rip
network 202.50.100.0 255.255.255.0 <----vlan 100
network 8.0.0.0 255.0.0.0 <----WAN Network between R1 and R2
In Static,
router 1
ip route 202.50.50.0 255.255.255.0 8.0.0.2 <----Internet interface
ip route 202.50.140.0 255.255.255.0 8.0.0.2 <----vlan 140
network 202.50.120.0 255.255.255.0 8.0.0.2 <----vlan 120
router 2
ip route 202.50.100.0 255.255.255.0 8.0.0.1 <----vlan 100
In OSPF,
router 1
router ospf 1
router-id 1.1.1.1
network 202.50.50.0 0.0.0.255 area 0 <----Internet interface, should be in same AREA
network 202.50.140.0 0.0.0.255 area 0 <----vlan 140, should be in same AREA
network 202.50.120.0 0.0.0.255 area 0 <----vlan 120, should be in same AREA
network 8.0.0.0 0.255.255.255 area 0 <----WAN Network between R1 and R2, should be in same AREA
router 2
router ospf 1 <---------Process-ID can be same
router-id 2.2.2.2 <-------Router-ID must ne UNIQUE.
network 202.50.100.0 0.0.0.255 area 0 <----vlan 100, should be in same AREA
network 8.0.0.0 0.255.255.255 area 0 <----WAN Network between R1 and R2, should be in same AREA
In EIGRP,
router 1
router eigrp 101 <---- Autonomous Number should be same
network 202.50.50.0 0.0.0.255 <----Internet interface
network 202.50.140.0 0.0.0.255 <----vlan 140
network 202.50.120.0 0.0.0.255 <----vlan 120
network 8.0.0.0 0.255.255.255 <----WAN Network between R1 and R2
router 2
router eigrp 101 <---- Autonomous Number should be same
network 202.50.100.0 0.0.0.255 <----vlan 100
network 8.0.0.0 0.255.255.255 <----WAN Network between R1 and R2
Use No auto-summary if needed if you want to apply classless Protocol on EIGRP else not necessary.
I hope this helps.
DM
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