gigabyte Ethernet connection

[peyushzach]

Hi,

we recently bought a gigabite link between our two branches close to eachother. we have VLAN implemented in both the buildings.

I have to stretch the private network between the buildings using giglink. and will get rid of VPN.alsowe can host servers in both buildings and make a mirror each other.

what i am confused is ..

-How i can achieve this ? i am planning to create a VLAN to route the traffic.

-i need to direct all the vloan traffic through this link.

-need to increase MTU size

-do i need to enable auto-negotiation.?

-what about spanning tree ?

-any additional advice ?

I am attaching the diagram below.

please help me out in this ,

thanks.

[peyushzach]

also how to direct iSCSI traffic through the gigabit line ?

somebody please advice me in this matter.. as i am having issues here delaying the project.

thanks,

[Mohammed Faiz]

Hi,

A lot of the answers depend upon the type of link you have between the buildings so questions like what MTU size of the link is should really be answered by your ISP.

> How i can achieve this ? i am planning to create a VLAN to route the traffic.

To link the two switches, create your new VLAN on each switch (VLAN 101 from your diagram) and assign a /30 IP on that VLAN on each switch.

e.g.

switch1# vlan 101 ip address 172.16.0.1/30

switch2# vlan 101 ip address 172.16.0.2/30

Then tag the VLAN on the port connecting to your branch link on each switch.

switch1# vlan 101 tag A1

Then you need to setup a routing protocol to advertise the routes between the switches, such as OSPF.

> -need to increase MTU size

You shouldn't need to change this.

> -do i need to enable auto-negotiation.?

I'd recommend fixing the port speeds on the ports to the branch link i.e. "int A1 speed-duplex 1000-full"

[peyushzach]

thanks for the reply,

* I actually planned exactly the same you said except

*VLAN 101 is in 10.101.1.0/30 because our iSCSI is in 172.16.x.1 network

* i think i have to use static routes coz I am using layer 3 Hp switch (2910al) and it doesnt support ospf..only RIP .

   any suggestions for that ?

* ALSO , the main issue now is i want to stretch iSCSI VLAN (172.16.x.1/24) between the buildings.

 how can this be possible ?

how i can route it ?

please help me in this .. as i am delaying the project because of this

Thanks.

[Mohammed Faiz]

If you want to span your iSCSI VLAN across the branches then just tag it between the two 2910's. You can tag as many VLANs as you want on a port but you can only have 1 untagged VLAN.

[ISoliman]

If you want to span it across the branches then no need for routed link you can just make the link between the 2 abuildings as layer 2 link and tag both ends in all the VLANs and create the VLANs in both buildings, do not use both routed link and layer 2 vlan tags between the sites not recommended

[peyushzach]

Hi,

I tried to connect our buldings via giagbite line and found out the line is down.

our ISP says the connection can only be done via optic etbernet port not RJ ethernet port.  So we ordered Optic module for 2910 switch on both sides,  Any advice in this. ?

I hope optic port is just another port as RJ and as long as i attach the module to the slot i will be able to view the interface and route the traffic in same way we discussed above.

[ISoliman]

Which Module you have ordered ?? and which Fiber cable you will use ? did you order the mini-gbics ?

[peyushzach]

It is single mode optical fibre, SFP module

[scifan3]

Are you working with a Single Strand? Or dual strand fiber link?  (if it's a single strand,  make sure your gbic's are the reciprocating gbic's)

Make sure you're crossing transmit to receive... You can always try swapping one of the end pairs to see if you can get link up.