OSPF Stub between EOS and EXOS not updating routing table


Userlevel 5
Hi,

Have a OSPF issue that I must be missing something obvious. Basically I have some EXOS devices activing as the core OSPF backbone area. At the edge I am using a EOS C5 switch configured as an OSPF Stub area.

The two have created a neighbourship between them, and I can see this in the LSDB tables.

The problem is I can't see the routes from the edge showing up on the core. This is the one I'm interested in at the moment:

172.20.0.254 255.255.255.0

Here is a quick diagram:



Here is the OSPF config on Core 1 (only one connected at the moment), the points of interest are via the P2P VLAN "OSPF-Col-BSD-CEF" and area 172.20.192.254 :

configure ospf routerid 172.20.207.62
enable ospf
enable ospf export static cost 2 type ase-type-1
create ospf area 172.20.192.254
configure ospf area 172.20.192.254 stub nosummary stub-default-cost 10
configure ospf add vlan Core1-To-Core2 area 0.0.0.0 link-type point-to-point
configure ospf vlan Core1-To-Core2 priority 0
configure ospf add vlan Core1CEF-LgcyCEF area 0.0.0.0 link-type point-to-point
configure ospf vlan Core1CEF-LgcyCEF priority 0
configure ospf add vlan Cores-To-Cores area 0.0.0.0
configure ospf vlan Cores-To-Cores priority 130
configure ospf add vlan Mgmt-CEF-Core1 area 0.0.0.0 passive
configure ospf vlan Mgmt-CEF-Core1 priority 0
configure ospf vlan MLAG-ISC priority 0
configure ospf add vlan OSPF-Col-BSD-CEF area 172.20.192.254 link-type point-to-point
configure ospf vlan OSPF-Col-BSD-CEF priority 10 [/code]
Here is the config on the edge (only configured interface VLAN 101 for now for OSPF, as well as the P2P's):

interface vlan 101
ip address 172.20.0.254 255.255.255.0
ip ospf areaid 172.20.192.254
ip ospf enable
no shutdown
interface vlan 201
ip address 172.20.65.254 255.255.255.0
no shutdown
interface vlan 310
ip address 172.20.128.254 255.255.255.192
no shutdown
interface vlan 320
ip address 172.20.144.254 255.255.255.192
no shutdown
interface vlan 330
ip address 172.20.160.254 255.255.255.192
no shutdown
interface vlan 340
ip address 172.20.176.254 255.255.255.192
no shutdown
interface vlan 999
ip address 172.20.192.254 255.255.255.192
no shutdown
interface vlan 2001
ip address 172.20.248.1 255.255.255.252
ip ospf areaid 172.20.192.254
ip ospf enable
no shutdown
interface vlan 3001
ip address 172.20.249.1 255.255.255.252
ip ospf areaid 172.20.192.254
ip ospf enable
no shutdown
!
router id 172.20.192.254
router ospf 1
area 172.20.192.254 stub no-summary

The routing table on EOS shows the VLAN 101 and the P2P VLAN 2001 are up:

Col-BSD(su)->router#show ip route
Codes: C - connected, S - static, R - RIP, O - OSPF, IA - OSPF interarea
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
E - EGP, i - IS-IS, L1 - IS-IS level-1, LS - IS-IS level-2
* - candidate default, U - per user static route
C 172.20.0.0/24 [0/1] directly connected, Vlan 101
C 172.20.192.192/26 [0/1] directly connected, Vlan 999
C 172.20.248.0/30 [0/1] directly connected, Vlan 2001

Col-BSD(su)->router#show ip ospf interface
Vlan 101
Internet Address 172.20.0.254 Mask 255.255.255.0, Area 172.20.192.254
Router ID 172.20.192.254, Cost: 10 (computed)
Transmit Delay is 1 sec, State designated-router, Priority 1
Designated Router id 172.20.192.254, Interface Addr 172.20.0.254
Backup Designated Router id 0.0.0.0,
Timer intervals configured, Hello 10, Dead 40, Retransmit 5
Vlan 2001
Internet Address 172.20.248.1 Mask 255.255.255.252, Area 172.20.192.254
Router ID 172.20.192.254, Cost: 10 (computed)
Transmit Delay is 1 sec, State designated-router, Priority 1
Designated Router id 172.20.192.254, Interface Addr 172.20.248.1
Backup Designated Router id 172.20.207.62,
Timer intervals configured, Hello 10, Dead 40, Retransmit 5
Vlan 3001
Internet Address 172.20.249.1 Mask 255.255.255.252, Area 172.20.192.254
Router ID 172.20.192.254, Cost: 10 (computed)
Transmit Delay is 1 sec, State Err, Priority 1
Designated Router id Err, Interface Addr 172.20.249.1
Backup Designated Router id Err,
Timer intervals configured, Hello 10, Dead 40, Retransmit 5

Routing table on EXOS, but its not showing the subnet 172.20.0.254 255.255.255.0 via OSPF-Col-BSD-CEF:

Col-Core1.68 # show iproute
Ori Destination Gateway Mtr Flags VLAN Duration
#d 172.20.207.0/26 172.20.207.62 1 U------um--f- Mgmt-CEF-Core1 0d:2h:3m:4s
#oa 172.20.207.64/26 172.20.251.242 11 UG-D---um--f- Core1-To-Core2 0d:1h:13m:56s
#oa 172.20.207.128/26 172.20.250.243 12 UG-D---um--f- Cores-To-Cores 0d:1h:13m:52s
#oa 172.20.207.192/26 172.20.250.243 13 UG-D---um--f- Cores-To-Cores 0d:1h:13m:52s
#d 172.20.248.0/30 172.20.248.2 1 U------um--f- OSPF-Col-BSD-CEF 0d:1h:42m:33s
#d 172.20.250.224/30 172.20.250.225 1 U------um--f- Core1CEF-LgcyCEF 0d:2h:3m:4s
#oa 172.20.250.228/30 172.20.251.242 11 UG-D---um--f- Core1-To-Core2 0d:1h:13m:56s
#oa 172.20.250.232/30 172.20.250.243 12 UG-D---um--f- Cores-To-Cores 0d:1h:13m:52s
#oa 172.20.250.236/30 172.20.250.243 13 UG-D---um--f- Cores-To-Cores 0d:1h:13m:52s
#d 172.20.250.240/29 172.20.250.241 1 U------um--f- Cores-To-Cores 0d:2h:3m:4s
#d 172.20.251.240/30 172.20.251.241 1 U------um--f- Core1-To-Core2 0d:2h:3m:4s
#oa 172.20.251.244/30 172.20.250.243 3 UG-D---um--f- Cores-To-Cores 0d:1h:13m:52s
#d 172.20.251.252/30 172.20.251.253 1 U------um--f- MLAG-ISC 0d:2h:3m:4s

OSPF Database on EOS:

Col-BSD(su)->router#show ip ospf database
OSPF Router with ID(172.20.192.254)
Displaying Router Link States(Area 172.20.192.254)
LinkID ADV Router Age Seq# Checksum
172.20.192.254 172.20.192.254 117 0x80000009 0x37bb
172.20.207.62 172.20.207.62 826 0x80000005 0xc0e8
Displaying Net Link States(Area 172.20.192.254)
LinkID ADV Router Age Seq# Checksum
172.20.248.1 172.20.192.254 827 0x80000003 0x8c46
Displaying Ipnet Sum Link States(Area 172.20.192.254)
LinkID ADV Router Age Seq# Checksum
0.0.0.0 172.20.207.62 118 0x80000009 0x777

OSPF LSDB on EXOS:

Col-Core1.68 # show ospf lsdb
Router LSAs for area 0.0.0.0
Link State ID Adv Router Seq# Age Chksum #Links
-------------------------------------------------------------
172.20.207.62 172.20.207.62 0x80000006 914 0xf1b5 5
172.20.207.126 172.20.207.126 0x8000000a 931 0x2da0 5
172.20.207.190 172.20.207.190 0x8000000c 929 0xeda0 5
172.20.207.254 172.20.207.254 0x80000009 178 0x 6b6 5
Network LSAs for area 0.0.0.0
Link State ID Adv Router Seq# Age Chksum
-------------------------------------------------------------
172.20.250.243 172.20.207.190 0x80000003 929 0xd070
Summary LSAs for area 0.0.0.0
Link State ID Adv Router Seq# Age Chksum
-------------------------------------------------------------
172.20.248.0 172.20.207.62 0x80000003 944 0x3e93
Router LSAs for area 172.20.192.254
Link State ID Adv Router Seq# Age Chksum #Links
-------------------------------------------------------------
172.20.192.254 172.20.192.254 0x80000009 238 0x37bb 2
172.20.207.62 172.20.207.62 0x80000005 945 0xc0e8 2
Network LSAs for area 172.20.192.254
Link State ID Adv Router Seq# Age Chksum
-------------------------------------------------------------
172.20.248.1 172.20.192.254 0x80000003 948 0x8c46
Summary LSAs for area 172.20.192.254
Link State ID Adv Router Seq# Age Chksum
------------------------------------------------------------

OSPF Neighbour EXOS:

Col-Core1.69 # show ospf neighbor
Neighbor ID Pri State Up/Dead Time Address Interface
BFD Session State
==========================================================================================
172.20.207.126 0 FULL /DROTHER 00:01:23:02/00:00:00:02 172.20.251.242 Core1-To-
None
172.20.207.190 120 FULL /DR 00:01:23:00/00:00:00:10 172.20.250.243 Cores-To-
None
172.20.192.254 1 FULL /DR 00:01:23:00/00:00:00:00 172.20.248.1 OSPF-Col-
None
Total number of neighbors: 3 (All neighbors in Full state)

OSPF Neighbour EOS:

Col-BSD(su)->router#show ip ospf neighbor
ID Pri State Dead-Int Address Interface
172.20.207.62 10 Full 40 172.20.248.2 vlan2001

Col-Core1.3 # show version
Switch : 800770-00-04 1746N-40857 Rev 4.0 IMG: 22.3.1.4
Image : ExtremeXOS version 22.3.1.4 22.3.1.4-patch1-7 by release-manager
on Tue Jan 16 09:05:31 EST 2018
Diagnostics : 2.5
Certified Version : EXOS Linux 3.18.48, FIPS fips-ecp-2.0.16

Col-BSD(su)->show switch
Management Preconfig Plugged-in Switch Code
Switch Status Model ID Model ID Status Version
------ ------------ ----------- ----------- --------------------- --------------
1 Mgmt Switch C5G124-48P2 C5G124-48P2 OK 06.71.03.0025
2 Stack Member C5G124-48P2 C5G124-48P2 OK 06.71.03.0025

Many thanks in advance.

1 reply

Userlevel 5
Figured it out.... the EOS device link-type is set to broadcast by default, whereas I had configured point-to-point on EXOS.

Reply