Extreme to Avaya, OSPF routes learned on Avaya but not EXOS

[Anonymous]

Hi,

Have a strange issue in that I have an Avaya and Extreme switch connected together, running ospf and a full adjacency.

Initial issue I had was ospf would get stuck on INIT on EXOS and Avaya was showing down. EXOS was configured as P2P and Avaya as NBMA. What I understand was EXOS was receiving an hello but the Avaya wasn't?

Ended up changing both ends to broadcast and immediately both ends went to full. Have configured EXOS to be DR and Avaya to BDR, although I have tried it either way around by configuring the priority but made no difference.

Issue I have is that the Avaya is learning all the routes from EXOS but EXOS isn't learning anything from Avaya?

I can't workout why it would be in one direction like this, and the link-types are the same on both sides.

EXOS is running version 22.6.1.4 (X590)
Avaya is running version 7.2.24.0 (ERS-8006)

Configs bellow:

EXOS:

code:

configure ospf routerid 10.1.243.201
enable ospf
enable ospf export static cost 2 type ase-type-1
configure ospf add vlan AggCore1-To-AggCore2 area 0.0.0.0 link-type point-to-point
configure ospf vlan AggCore1-To-AggCore2 bfd on
configure ospf add vlan Avaya-AggCore-P2P area 0.0.0.0
configure ospf vlan Avaya-AggCore-P2P priority 21
configure ospf vlan Avaya-AggCore-P2P bfd on
configure ospf add vlan Mgmt-Bunhill-AggCore1 area 0.0.0.0 passive
configure ospf vlan Mgmt-Bunhill-AggCore1 priority 0
configure ospf add vlan Nexus-AggCore-P2P area 0.0.0.0 link-type point-to-point

code:

Bunhill-AggCore1.100 # show ospf neighbor detail
 Neighbor 10.1.243.202, interface address 10.1.243.202
  In the area 0.0.0.0 via interface AggCore1-To-AggCore2
  Neighbor priority is 1, State is FULL,5 state changes
  DR is 0.0.0.0 BDR is 0.0.0.0
  Options is 0x42
  Neighbor is up for 00:01:33:59
  Time since last Hello 00:00:00:09
  Retransmission queue length is 0
  BFD Session State: Active

code:

 Neighbor 10.10.10.252, interface address 10.1.243.222
  In the area 0.0.0.0 via interface Avaya-AggCore-P2P
  Neighbor priority is 20, State is FULL,5 state changes
  DR is 10.1.243.221 BDR is 10.1.243.222
  Options is 0x42
  Neighbor is up for 00:00:36:31
  Time since last Hello 00:00:00:06
  Retransmission queue length is 0

code:

Bunhill-AggCore1.101 # show ospf lsdb

        AS External LSAs
Link State ID  Adv Router   Seq#     Age Chksum Tag
-------------------------------------------------------------
10.2.17.0    10.1.243.201  0x8000002d 272 0xfb43  0
10.2.57.0    10.1.243.201  0x8000002d 272 0x42d4  0
10.2.107.0   10.1.243.201  0x8000002d 272 0x1aca  0
10.2.157.0   10.1.243.201  0x8000002d 272 0xf1c0  0
10.2.207.0   10.1.243.201  0x8000002d 272 0xc9b6  0

        Router LSAs for area 0.0.0.0
Link State ID  Adv Router   Seq#     Age Chksum #Links
-------------------------------------------------------------
10.1.243.201  10.1.243.201  0x80000055 423 0xd96d 5
10.1.243.202  10.1.243.202  0x80000037 274 0x67d4 5
10.10.10.252  10.10.10.252  0x80000010 436 0xc287 1

        Network LSAs for area 0.0.0.0
Link State ID  Adv Router   Seq#     Age Chksum
-------------------------------------------------------------
10.1.243.221  10.1.243.201  0x80000002 423 0xe3ed

Avaya Configuration is as follows, have enabled and disable mtu-ignore but made no difference:

code:

mlt 20 add ports 2/41
mlt 20 mcast-distribution enable 
mlt 20 name "Avaya-AggCore-P2P" 
mlt 20 perform-tagging enable 

vlan 3220 create byport 1 name "Avaya-AggCore-P2P"
vlan 3220 add-mlt 20
vlan 3220 ports remove 1/1-1/48,2/1-2/40,2/42-2/48,3/1-3/48,4/1-4/48 member portmember
vlan 3220 ports add 2/41 member portmember
vlan 3220 ip create 10.1.243.222/255.255.255.252 mac_offset 35
vlan 3220 ip ospf enable
vlan 3220 ip ospf priority 20 

ethernet 2/41 default-vlan-id 3220
ethernet 2/41 enable-diffserv true 
ethernet 2/41 name "2nd Floor East" 
ethernet 2/41 slpp packet-rx enable
ethernet 2/41 slpp packet-rx-threshold 5

ip ospf router-id 10.10.10.252
ip ospf admin-state enable 
ip ospf enable
ip ospf interface 10.1.243.222 area 0.0.0.0
ip ospf interface 10.1.243.222 mtu-ignore enable
ip ospf interface 10.1.243.222 bfd enable

ip ospf redistribute static create 
ip ospf redistribute static metric 2 
ip ospf redistribute static enable 
ip ospf redistribute static apply 

As you can see below routes are being learnt on the Avaya;

code:

show/ip/route# info
*******************************************************************************
Command Execution Time: SAT MAY 11 11:24:56 2019 BST
*******************************************************************************

===========================================================================================
                 IP Route - GlobalRouter
===========================================================================================
                           NH        INTER
DST       MASK      NEXT         VRF     COST FACE PROT AGE TYPE PRF
-------------------------------------------------------------------------------------------
0.0.0.0     0.0.0.0     10.10.10.251     GlobalRout~ 1  10  STAT 0  IB  5
10.1.200.1   255.255.255.255 10.1.243.221     GlobalRout~ 20  3220 OSPF 0  IB  20
10.1.200.2   255.255.255.255 10.1.243.221     GlobalRout~ 22  3220 OSPF 0  IB  20
10.1.243.200  255.255.255.252 10.1.243.221     GlobalRout~ 12  3220 OSPF 0  IB  20
10.1.243.220  255.255.255.252 10.1.243.222     -     1  3220 LOC 0  DB  0
10.1.243.224  255.255.255.252 10.1.243.221     GlobalRout~ 22  3220 OSPF 0  IB  20
10.1.243.228  255.255.255.252 10.1.243.221     GlobalRout~ 22  3220 OSPF 0  IB  20
10.1.243.232  255.255.255.252 10.1.243.221     GlobalRout~ 20  3220 OSPF 0  IB  20
10.2.17.0    255.255.255.0  10.1.243.221     GlobalRout~ 12  3220 OSPF 0  IB  120
10.2.57.0    255.255.255.0  10.1.243.221     GlobalRout~ 12  3220 OSPF 0  IB  120
10.2.107.0   255.255.255.0  10.1.243.221     GlobalRout~ 12  3220 OSPF 0  IB  120
10.2.157.0   255.255.255.0  10.1.243.221     GlobalRout~ 12  3220 OSPF 0  IB  120
10.2.207.0   255.255.255.0  10.1.243.221     GlobalRout~ 12  3220 OSPF 0  IB  120

Many thanks in advance

[Anonymous]

Ah, right, of course!! That's a little more obvious in the EXOS cli:

enable ospf export static cost 2 type ase-type-1

Thanks Ludovico, appreciate the quick response.

[Ludovico_Steven]

For an OSPF router to advertize external routes into OSPF, it has to be an ASBR.
Good stuff
Ciao
Ludovico

[Anonymous]

Hi Ludovico,

Appreciate you posting back.

With regards to ASBR both the Avaya And EXOS device are in the same area, does is still require the Avaya to be configured as ASBR to redistribute the static routes? Not sure that's the case with regards to 2 x EXOS devices connected together in the same area?

Turns out part of my error was that I had not included the other subnets into the Avaya config using the following command:

ip ospf interface 10.1.243.222 area 0.0.0.0

Once I put them all in the routes exchanged without problem... should have realised!

Still not sure why the static routes are not redistributing, albeit it might be for exactly the reason you state but just wanted to confirm.

Many thanks

[Ludovico_Steven]

If the ERS8k is to redistribute static routes into OSPF, you need to configure it as an ASBR. Seems that line is missing in the global OSPF config.