01-18-2012 11:01 AM - edited 03-07-2019 04:25 AM
Hi all,
Please may i know if we can config redundancy with router (without Switch) ?? I have two internet connection.
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01-23-2012 04:36 AM
Hi,
Maybe this link may help you
http://www.cisco.com/en/US/tech/tk648/tk362/technologies_configuration_example09186a0080094e90.shtml
Eugen
01-23-2012 06:35 PM
Yes you can have two paths for traffic to have redundancy accessing the WAN, but you will have a single point of hardware failure( your router).
Create two static routes to enable all host ( or certain number of hosts) to access either interface or both.
Both routes will be included in routing table because they will have the same cost.
Example: ip route 192.168.10.0 255.255.255.0 s0/0/0 (interface connecting to ISP 1)
ip route 172.16.10.0 255.255.255.0 s0/0/1 (interface connected to ISP 2)
ip route 192.168.10.0 255.255.255.0 s0/0/1 (interface connected to ISP 2)
I think that you should redirect traffic that is sensitive to latency out one interface and use other interface for less important traffic
Hope this helps
01-18-2012 11:49 AM
If you have a single router, no switch, and two Internet connections then I do not see any way that you can configure redundancy, other than providing routing logic to have one Internet connection function as backup to the other.
HTH
Rick
01-20-2012 04:38 AM
As Richard mentioned, the only redundancy possible with One router and no switch, is Internet WAN link redundancy.
you can use the Internet links as Active-backup (failover with two default routes, one with a higher AD to act as backup link) or Active-Active (load balancing with two default routes both with same AD but do make sure NAT is configured properly)
01-20-2012 11:44 AM
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Posting
The 7304 was a router that supported redundancy of components in the box, including the route processor, but it's now, I believe, EoS. I don't recall any other router in the Cisco line up that can support such redundancy in a single box beyond the L3 switch "router" type chassis devices, e.g. 7604.
01-20-2012 10:23 PM
thanks i think so
01-23-2012 04:13 AM
01-23-2012 06:16 AM
Disclaimer
The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.
Liability Disclaimer
In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.
Posting
KOUAMOU Franck stephane wrote:
Do I think they can't? Not at all, however older IOS images might not support GLBP or VRRP and for any of these (also HSRP), you're generally working with more than one device to provide gateway redundancy.
01-23-2012 04:36 AM
Hi,
Maybe this link may help you
http://www.cisco.com/en/US/tech/tk648/tk362/technologies_configuration_example09186a0080094e90.shtml
Eugen
01-23-2012 05:49 AM
OK thanks
- can we use one router with two ISP and make redundancy ??
01-23-2012 06:35 PM
Yes you can have two paths for traffic to have redundancy accessing the WAN, but you will have a single point of hardware failure( your router).
Create two static routes to enable all host ( or certain number of hosts) to access either interface or both.
Both routes will be included in routing table because they will have the same cost.
Example: ip route 192.168.10.0 255.255.255.0 s0/0/0 (interface connecting to ISP 1)
ip route 172.16.10.0 255.255.255.0 s0/0/1 (interface connected to ISP 2)
ip route 192.168.10.0 255.255.255.0 s0/0/1 (interface connected to ISP 2)
I think that you should redirect traffic that is sensitive to latency out one interface and use other interface for less important traffic
Hope this helps
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