Hello,
My understanding of OSPF is being challenged by recent upgrade of some
of our 7600's (running SRD2a now).
Pairs of 7600's are ABR's to totally stubby NSSA areas (area X nssa
no-summary default-information originate). This is supposed to prevent
all external and summary routes reaching NSSA area, as well as
originate type 7 default. However, I'm seeing something else. This is
from one of the internal routers (.227 and .228 are ABR's):
OSPF Router with ID (xxx.yyy.zzz.24) (Process ID 1)
Router Link States (Area 9)
Link ID ADV Router Age Seq# Checksum Link count
xxx.yyy.zzz.24 xxx.yyy.zzz.24 245 0x80009C45 0x006365 2
xxx.yyy.zzz.25 xxx.yyy.zzz.25 1596 0x80009C3F 0x008347 2
xxx.yyy.zzz.26 xxx.yyy.zzz.26 1560 0x80009C3D 0x009B2D 2
xxx.yyy.zzz.27 xxx.yyy.zzz.27 663 0x80009C3C 0x00B114 2
xxx.yyy.zzz.227 xxx.yyy.zzz.227 224 0x8000933F 0x00F96C 1
xxx.yyy.zzz.228 xxx.yyy.zzz.228 133 0x80005CBB 0x00A479 1
Net Link States (Area 9)
Link ID ADV Router Age Seq# Checksum
xxx.yyy.zzz.130 xxx.yyy.zzz.228 1129 0x8000016A 0x00258A
Summary Net Link States (Area 9)
Link ID ADV Router Age Seq# Checksum
0.0.0.0 xxx.yyy.zzz.227 224 0x80000165 0x007943
0.0.0.0 xxx.yyy.zzz.228 133 0x80000167 0x006F4A
Type-7 AS External Link States (Area 9)
Link ID ADV Router Age Seq# Checksum Tag
0.0.0.0 xxx.yyy.zzz.227 224 0x80000165 0x004DEA 0
0.0.0.0 xxx.yyy.zzz.228 133 0x80000166 0x0045F0 0
ABR's appear to be injecting both the type 3 and type 7. AHave I gone
mad, or I need to hit back the books?
--
Marko
CCIE #18427 (SP)
My network blog: http://cisco.markom.info/
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