06-20-2022 10:47 AM - last edited on 06-20-2022 12:10 PM by Translator
Hi team,
The topology is like PE1-- (ibgp) --> PE2 ( bgp --> OSPF redistribution ) --> CE 2.
All the devices are IOS XR nodes.
The route is available in PE2 in iBGP and is getting redistributed to OSPF.
In CE1 , we could see the route in database, nut not in FIB.
kindly help on the same please
Prefix : 192.168.153.227/32
PE2 Logs
--------------------------------
router ospf 2
vrf test
router-id 1.1.1.1
bfd fast-detect
redistribute bgp 138384 metric-type 1 route-policy BGP_TO_OSPF
address-family ipv4 unicast
area 1
network point-to-point
interface TenGigE0/0/0/3.2511
!
--------------------------------------------------
show ospf vrf test routes external 192.168.153.227/32
External Topology Table for ospf 2, VRF mobility_data1 with ID 192.168.153.125
Codes: O - Intra area, O IA - Inter area
O E1 - External type 1, O E2 - External type 2
O N1 - NSSA external type 1, O N2 - NSSA external type 2
C - connected, S - static, L - local, R - RIP, B - BGP
i L1 - IS-IS level-1, i L2 - IS-IS level-2, i ia - IS-IS inter area
E D - EIGRP, E X - EIGRP external
D - DAGR, A - Subscriber
B 192.168.153.227/32, metric 2
0.0.0.0, redistributed from bgp xxxxx, via NULLIFHNDL
RT: 1.0.0.0:1:0 Router ID:192.168.153.123
---------------------------------------------------
CE2Logs
---------------
router ospf 2
vrf test
router-id 192.168.153.127
bfd fast-detect
address-family ipv4 unicast
area 1
network point-to-point
interface Loopback15
passive enable
!
interface TenGigE0/0/0/23.2511
----------------------------
show ospf vrf test routes 192.168.153.227/32
---------------------------------------
show ospf vrf mobility_data1 database summary 192.168.153.227
OSPF Router with ID (192.168.153.127) (Process ID 2, VRF test)
Summary Net Link States (Area 1)
LS age: 880
Options: (No TOS-capability, DC, DN)
LS Type: Summary Links (Network)
Link State ID: 192.168.153.227 (Summary Network Number)
Advertising Router: 192.168.153.125
LS Seq Number: 80000003
Checksum: 0xafa1
Length: 28
Network Mask: /32
TOS: 0 Metric: 2
Solved! Go to Solution.
06-20-2022 10:52 AM - last edited on 06-20-2022 12:11 PM by Translator
06-20-2022 11:56 AM - last edited on 06-20-2022 12:13 PM by Translator
Hello @studentcisco52 ,
@MHM Cisco World is right
>> Options: (No TOS-capability, DC, DN)
the DN bit is set meaning the OSPF LSA comes from redistribution from MP BGP in order to have the LSA accepted and used you need the
capability vrf-lite
that allows the multi VRF CE device to accept routes that have the DN bit set.
On the other hand the DN bit is also an elegant way to control route propagation and to avoid re-enjction in the backbone.
Hope to help
Giuseppe
06-20-2022 10:52 AM - last edited on 06-20-2022 12:11 PM by Translator
Capabillity vrf lite
You need to add this command under ce opsf
06-20-2022 11:56 AM - last edited on 06-20-2022 12:13 PM by Translator
Hello @studentcisco52 ,
@MHM Cisco World is right
>> Options: (No TOS-capability, DC, DN)
the DN bit is set meaning the OSPF LSA comes from redistribution from MP BGP in order to have the LSA accepted and used you need the
capability vrf-lite
that allows the multi VRF CE device to accept routes that have the DN bit set.
On the other hand the DN bit is also an elegant way to control route propagation and to avoid re-enjction in the backbone.
Hope to help
Giuseppe
06-20-2022 12:02 PM
@Giuseppe Larosa @MHM Cisco World :
Thanks for the quick support and guidance ...
Now the issue is resolved
06-20-2022 12:08 PM
You are so so Welcome
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