Hi All need little help with understanding qos on 6509. i have two layer circuits coming from dc into campus which terminate onto 6509, i need to know how to configure qos... whether to configure svi or subinterface? ....current qos plocy has voice prioritzed amd policed and wee have parent and child qos statement..any help is highly appreciated. thanks ... View more

Hi All the Gurus Need little help and guidance with below. please see attached topology....i want to understand role of DR when it comes to distributing type external routes...in my scenario my DR is also ASBR, and i have two other ASBR that are injecting default route. RED is logical connection Black is physical connection same ospf  process and area configured thorugh out RW1 is accepting ebgp default route and few specific routes RW2 is only acceptng default route from EBGP IBGP between RW1 and RW2 RW1 default route from ebgp is cancelled by RW2 ebgp default route due to less as paths RW1 IBGp learnt default route is cancelled by OSPF default route (default information originate (type 1) on both RW1/RW2) RW1 has two default routes one is via IBGP/OSPF Link and one via SW1 (its DR) RW2 is passing same default route to SW4 and SW4 is passing same on to its ospf peers.   SW1 is DR for (1.1.1.0/24) and RW2 is BDR. SW1 and sw2 has static routes and default static routes configured and redistrubuted as type 2 into ospf   SW1 and Sw2 has default route pointing to VIP of MHSRP configured on RW1 and RW2 1.1.1.254 (VIP) 1.1.1.242 (physical on RW1) 1.1.1.243 (Physical on RW2). now if i remove static default routes on SW1 and SW2 pointing to MHSRP VIP default route injected by RW1 and takesover on SW1 and default route injected by RW2 is taken over on SW2 so now on sw1 next hop of deault changes from 1.1.1.254 to 1.1.1.242 and on RW2 changes to 1.1.1.243 in my topology now i have RW1 and Rw2 which are ASBR and participting in broadcast ospf neighbor relationship SW1 whic is acting as DR for segment 1.1.1.0/24 also is ASBR. My understanding that RW1 would pass default route to SW1, RW2 and sw2.... Can anyone see any routing loop being formed. Can switch one accept both default route from RW1 direct and the  (R1) route passed on from RW2 to SW1   also i was under impression DR gets all the routes (SW1) and pass them on to rest of the neighbors RW2, SW2 but i see RW2 passing default route directly to SW1,SW2,RW1 on point to point link and Broadcast links etc. ... View more

Hi All Need little help with troubelshooting loop caused by ospf default injection command....we have two wan edges injecting default route (not always keyword added) via ospf into lan and learning default route from bgp... both routers has one lan port connected to core switch....now when one router lose wan connectivity loop is created because default route is cleared by router 1 as it loses its bgp defalt route and ibgp default route is put into rib failure because default route is learnt  via ospf as well...now i know ospf wont inject default route into lan if its learnt from same procvess id ospf , it has to learn default route from another routing protocol or another ospf process but its not exhibiting correct behaviour...in stable conditions when i do show ip ospf data adv (peer IP) on wan edge i dont see any default route coming from core switch but when i do same command on core switch i can see type default route is learnt from both wan edges...can someone poingt in right direction....Labbed it in GNS3 and worked fine but production causing issue ta ... View more