Hi,
We are employing OSPF in our Network i.e. 3 locations each of them in
3 different areas and backbone routers on area 0. now we are having a
problems in Summarizing E1 type of Routes we have employed the area
xx range x.x.x.x x.x.x.x command on the ABR but still we are getting
Breakup routes like /28 and /29 along with the summarized /24 or /22
routes.
Can any one of you help me as to how we should go about in
summarizing the E1 Routes.
you can't summarize externel routes anywhere in the OSPF network except
on the ASBR where you redistribute the routes into OSPF
(http://www.cisco.com/warp/public/104/1.html#t30).
area xx range <prefix> <mask> does not apply to external OSPF routes.
oli
If summarizing routes is top priority there is always possibility to change
area type to NSSA , where
ABR can summarize/filter during LSA7 to LSA5 translation .Of course not
always NSSA is viable solution ,
all depends on actual topology and network design.
regards