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тАО07-23-2009 09:53 PM
тАО07-23-2009 09:53 PM
network design - which protocol to choose?
Hi,
on the attached jpg file you can see a designed backbone or core network.
The 4 core buildings A,B,C,D are connected within a city WAN. Each of them is connected twice. Also each of the routers belong to the same IP subnet. speed is 1gbit/s everywhere.
The network has 2 firewalls at the end and 2 connection to the ISP with BGP.
The goal is to have load balancing as far as possible.
So which protocols would you use for this purpose?
on the attached jpg file you can see a designed backbone or core network.
The 4 core buildings A,B,C,D are connected within a city WAN. Each of them is connected twice. Also each of the routers belong to the same IP subnet. speed is 1gbit/s everywhere.
The network has 2 firewalls at the end and 2 connection to the ISP with BGP.
The goal is to have load balancing as far as possible.
So which protocols would you use for this purpose?
3 REPLIES 3
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тАО07-25-2009 07:03 AM
тАО07-25-2009 07:03 AM
Re: network design - which protocol to choose?
Use VRRP combined with MSTP on the sites A,B and C on the routers connected to the city WAN. Configure this only on the 'edge' direction. The devices behind these routers (not connected to the city WAN) should/could be simpel level2 switches with MSTP enabled. All clients/servers connect to these switches.
Run OSPF on the city WAN connected routers. If possible run two separate VLAN's (call them routing lan 1 and 2) on the city WAN. Each router in each site connect to either VLAN 1 or either VLAN 2. If not possible (city WLAN is one big subnet), also run MSTP on this.
On the devices connected to the firewall originate the default route (0.0.0.0/0) into OSPF.
Run OSPF on the city WAN connected routers. If possible run two separate VLAN's (call them routing lan 1 and 2) on the city WAN. Each router in each site connect to either VLAN 1 or either VLAN 2. If not possible (city WLAN is one big subnet), also run MSTP on this.
On the devices connected to the firewall originate the default route (0.0.0.0/0) into OSPF.
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тАО07-26-2009 08:03 AM
тАО07-26-2009 08:03 AM
Re: network design - which protocol to choose?
Hi,
thanks for your answer.
>Use VRRP combined with MSTP on the sites >A,B and C on the routers connected to the >city WAN.
So, you se no possibility to go for real load balancing with all connected routers?
>Configure this only on the 'edge' >direction.
Can you please clarifiy?
>The devices behind these routers (not >connected to the city WAN) should/could be >simpel level2 switches with MSTP enabled. >All clients/servers connect to these >switches.
ok
>Run OSPF on the city WAN connected routers.
ok
>If possible run two separate VLAN's (call >them routing lan 1 and 2) on the city WAN.
hm, now I have 1 VLAN, imagine the picture without redundancy, that├В┬┤s how the situation is now.
>Each router in each site connect to either >VLAN 1 or either VLAN 2. If not possible >(city WLAN is one big subnet), also run >MSTP on this.
So it├В┬┤s better to have 2 VLANs?
>On the devices connected to the firewall >originate the default route (0.0.0.0/0) >into OSPF.
ok
thanks for your answer.
>Use VRRP combined with MSTP on the sites >A,B and C on the routers connected to the >city WAN.
So, you se no possibility to go for real load balancing with all connected routers?
>Configure this only on the 'edge' >direction.
Can you please clarifiy?
>The devices behind these routers (not >connected to the city WAN) should/could be >simpel level2 switches with MSTP enabled. >All clients/servers connect to these >switches.
ok
>Run OSPF on the city WAN connected routers.
ok
>If possible run two separate VLAN's (call >them routing lan 1 and 2) on the city WAN.
hm, now I have 1 VLAN, imagine the picture without redundancy, that├В┬┤s how the situation is now.
>Each router in each site connect to either >VLAN 1 or either VLAN 2. If not possible >(city WLAN is one big subnet), also run >MSTP on this.
So it├В┬┤s better to have 2 VLANs?
>On the devices connected to the firewall >originate the default route (0.0.0.0/0) >into OSPF.
ok
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тАО07-26-2009 10:38 PM
тАО07-26-2009 10:38 PM
Re: network design - which protocol to choose?
>So, you se no possibility to go for real >load balancing with all connected routers?
It still is real loadbalancing. However you always must choose the right protocol on each router dependend on how your clients connect.
> Can you please clarifiy?
Towards the clients.
> So it├Г ├В┬┤s better to have 2 VLANs?
Yes because you then create a 'blue' network and a 'green' network seperating problem zones. Also it saves you from using mstp in the city wan.
It still is real loadbalancing. However you always must choose the right protocol on each router dependend on how your clients connect.
> Can you please clarifiy?
Towards the clients.
> So it├Г ├В┬┤s better to have 2 VLANs?
Yes because you then create a 'blue' network and a 'green' network seperating problem zones. Also it saves you from using mstp in the city wan.
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