[j-nsp] OSPF default in TSA
Harry Reynolds
harry at juniper.net
Thu May 14 16:47:43 EDT 2009
Does rc2 have an area 0 adjacency up? If not I believe active backbone detection suppresses the default. Looks likes its area 0 lsdb is all self-populated.
Regards
http://www.juniper.net/techpubs/software/junos/junos94/swconfig-routing/configuring-the-backbone-area-and-other-areas.html
-----Original Message-----
From: juniper-nsp-bounces at puck.nether.net [mailto:juniper-nsp-bounces at puck.nether.net] On Behalf Of The Dark One
Sent: Thursday, May 14, 2009 1:24 PM
To: Juniper Puck
Subject: [j-nsp] OSPF default in TSA
Experts,
according to JNCIP_studyguide pag 179:
"Juniper Networks routers do not automatically generate a default route when operating as an ABR attached to a stub or not-so-stubby area. With JUNOS software, you must configure a default metric before a default route will be advertised!"
But router 'itp' doesn't get it :-( any idea why and how?
Thanks!
rc2> show configuration routing-instances RI protocols ospf
area 13.246.165.176 {
stub default-metric 1 no-summaries;
interface ge-5/2/1.176;
}
area 0.0.0.0 {
interface ge-5/2/0.314;
}
rc2> show ospf database instance RI
OSPF database, Area 0.0.0.0
Type ID Adv Rtr Seq Age Opt Cksum Len
Router *13.246.165.177 13.246.165.177 0x80000004 119 0x22 0x1813 36
Summary *13.246.165.151 13.246.165.177 0x80000004 119 0x22 0x712a 28
Summary *13.246.165.176 13.246.165.177 0x80000004 119 0x22 0x4248 28
OSPF database, Area 13.246.165.176
Type ID Adv Rtr Seq Age Opt Cksum Len
Router 13.246.165.151 13.246.165.151 0x80000006 266 0x20 0x8f14 48
Router *13.246.165.177 13.246.165.177 0x80000008 119 0x20 0xeed0 36
Network *13.246.165.177 13.246.165.177 0x80000003 119 0x20 0x12db 32
lab at hu-bud01a-rc2> show ospf neighbor instance RI
Address Interface State ID Pri Dead
13.246.165.178 ge-5/2/1.176 Full 13.246.165.151 1 36
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
itp#show ip interface brief | ex una
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 13.246.165.178 YES manual up up
Loopback0 13.246.165.151 YES manual up up
itp#show running-config | s router ospf
router ospf 1
router-id 13.246.165.151
log-adjacency-changes
area 13.246.165.176 stub
network 0.0.0.0 255.255.255.255 area 13.246.165.176 itp#show ip route <....> Gateway of last resort is not set
13.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 13.246.165.151/32 is directly connected, Loopback0
C 13.246.165.176/29 is directly connected, FastEthernet0/0
itp#show ip ospf database
OSPF Router with ID (13.246.165.151) (Process ID 1)
Router Link States (Area 13.246.165.176)
Link ID ADV Router Age Seq# Checksum Link count
13.246.165.151 13.246.165.151 424 0x80000006 0x008F14 2
13.246.165.177 13.246.165.177 278 0x80000008 0x00EED0 1
Net Link States (Area 13.246.165.176)
Link ID ADV Router Age Seq# Checksum
13.246.165.177 13.246.165.177 278 0x80000003 0x0012DB
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