Hi, Need some advice on the following. Have 2 data centers currently active/standby and am looking to advertise the same /24 prefixes from both locations in case a DC is lost. Currently not an option to use something like GTM in an active/active type scenario. Current setup is as following : Redundant firewalls/routers/load balancers etc. Web and FTP Farms Public /24 prefix advertised via BGP to internet. Inbound traffic routed from edge routers to external FW's and natted to VIP(s) on Loadbalancer. Server Poolsl sitting behind another layer of Internal firewalls. All addressing behind edge routers is RFC1918 DC1 and DC2 connected via 2 x 10G links with OSPF routing on Nexus 5596's. In order to avoid complex routing/NAT would the easiest way to do this maybe to create some kind of wan backbone between the edge routers and DC1/DC2 core 5596 routers using some kind of traffic seperation mechanism ( vrf's etc. ) so same stateful devices can then process return traffic. Any documents/links to similar setup would be helpful. Thanks in advance ... View more

Hi, We have a mixture of ATM, E3 and OC3 circuits connecting to our MPLS provider. My question is regarding the QoS policy configuration applied and its calculation in relation to the bandwidth of the interfaces. For example if we have a site with 3 E1 circuits in an IMA bundle the bandwidth is 61444 Kbps but the actual CIR provided to us by the telco is 5000Kbps. Now 3 E1's right give a bandwidth of 3 x 2048 = 6144Kbps but the actual clocking on each of the ATM interfaces when I look is 1920 ; so giving 1920 x 3 = 5760Kbps sh int atm0/0/0 | in BW   MTU 4470 bytes, sub MTU 4470, BW 1920 Kbit/sec, DLY 20000 usec Correct me if I am wrong but the QoS policy will calcultate depending on what the Bandwidth statement on the interface is and if I dont apply one it will be the 1920Kbps ( If I didnt manually put 6144 below and left this statment out will the ATM0/IMA0 use a bandwidth of 5760 ?). Giving a wrong statement could mean reserving more bandwidth than you actually have. ( If I have 6144 configured but we have a CIR of 5000 ?). I would presume you set the BW to what the CIR is from the provider. But these circuits  'are also burstable' up to the full speed if needed so which do you use ? eg interface ATM0/IMA0 bandwidth 6144 What I'd like to know is which is correct and can someone explain the above to me please. Thanks in advance for your feedback Frank ... View more