05-01-2007 03:58 AM - edited 03-03-2019 04:46 PM
Dear sir,
One of my customer is having main offce in bombay and branch office in hyderabad he was having 2 lines each line is 2mbps .now his headoffice he was having 3560 (L3)switch and branch office he was having catlyst express-500(ce-500 24tt).now he was connected 2 lines in l3 switch .now he was asking redundancy(i.e if one link gets down automatically next line has to up .now is it possible to do the redundancy from l3 to l2 switch.if it is possible give me some examples.and also he want both side communication.if it is not possible how can i go through this.
Regards
srinivas.D
+91 9246571397
Solved! Go to Solution.
05-04-2007 06:21 AM
Good, so once you verify that spanning tree is working correctly you have redundancy, then as I said you can see if you can make ether channel work.
Note that unless you can make the latter, the 2nd circuit does not do anything, this is due to the choice or bridging that is always wrong with WAN, with routing you could use the two circuit as one for more speed and performance.
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05-01-2007 04:22 AM
Hi,
Do the 2mbps lines come with serial interface or the provider has installed a router with ethernet ? do these line provide internet access too or are just leased lines ?
05-01-2007 04:42 AM
Dear bevilacqua,
Thanks for ur reply yes it was each line is 2mbps and provider has inistalled connector cum router having ethernet out.so he was having 2 connevertors each connevertor having 2mbps link that 2 links terminated on normal switch now he was asking redundancy between the two links.now l3 to l2 is possible on trunking.plz help me
Regards
srinivas.D
05-01-2007 05:00 AM
Hi, you should ask the provider if they configured the routers for routing, bridging or what, based on that you can decide hot to use the two links.
05-01-2007 05:23 AM
Dear sir,
That routers r in bridge mode .that two links is one for in use and second for backup.
now he want redundancy if one goes down second will automatically up he was seeing that type of solution
regards
srinivas.D
05-01-2007 06:05 AM
Hi,
first of all you have to verify that STP (bpdu frames) are passed by this bridge so you have spanning tree protocol running between the tow switches. If it does you are set and can look if toy can configure port aggregation and use both links at same time.
If it does not you have to talk with the provider and find a better solution or place you own router on the ce-500 side, configure vlan on ce500 and similarly on 3560.
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05-04-2007 04:47 AM
Dear sir,
We pass any and all Ethernet Frames including STP BPDU frames in Bridge
mode
Regards
srinivas.d
05-04-2007 06:21 AM
Good, so once you verify that spanning tree is working correctly you have redundancy, then as I said you can see if you can make ether channel work.
Note that unless you can make the latter, the 2nd circuit does not do anything, this is due to the choice or bridging that is always wrong with WAN, with routing you could use the two circuit as one for more speed and performance.
As a courtesy to those providing answers, please rate all post using the scrollbox below!
05-04-2007 09:31 PM
Dear sir,
PLz explain me clearly with exampls plz.
Regards
srinivas.D
05-05-2007 02:07 AM
Hello,
the example is your installation. With bridging, when there is more than one link between bridges, all but one are blocked to prevent loops. Routing is more intelligent, and that does not happen.
Thanks for the nice rating and good luck!
05-05-2007 03:10 AM
Dear sir,
u mean in my network routing is not happened .so now what can i do now sir.
so plz send me any examples how can i route.
Thanks for ur valube cordination.
waiting for ur reply.
Regards
srinivas.D
05-05-2007 03:17 AM
Hello,
if you want to convert to routing, send first here a diagram that includes exactly all devices installed, brand type and configuration, and who owns them, also include all the circuit installed, speed and type of interfaces, ip addresses currently used.
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