Ethernet Switches & Routers

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Occasional Contributor
Posts: 5
Registered: ‎09-11-2014
Accepted Solution

My Brocade to Cisco OSPF connection is flapping

I have a Cisco 6509 port channel talking to a Brocade CER LAG.  The OSPF connection I have configured is between virtual interface (within ESI on CER).  The ospf connection comes up and I get  FULL connection, but the CER is timing out the connection after 40sec (Dead-timer).  The CER indicates an inactivity-timer and the Cisco say it can't see itself in the hello.  I have tried to ping the multicast address from the CER (224.0.0.5), but nothing comes back.  Is there a trick to making these talk.  I have verified MTU size on both virtual interfaces, checked that they have matching ospf timers, disabled LLS on the Cisco interface, and added mtu-ignore.  None of these fix the issue.  I believe the issue is related to multicast, but I'm unable to confirm.  I have also tried both Broadcast and Point-to-Point OSPF network connections.  The only change in behavior is that in point-to-point, the Cisco is unable to get a OSPF neighbor state.  Need another set of eyes.

Frequent Visitor
Posts: 1
Registered: ‎09-09-2014

Re: My Brocade to Cisco OSPF connection is flapping

 Can you provide outputs of you Brocade to Cisco configs and your OSPF config?

Occasional Contributor
Posts: 5
Registered: ‎09-11-2014

Re: My Brocade to Cisco OSPF connection is flapping

Configuration:

 

Brocade CER:

lag "XXXX" dynamic id 4
 ports ethernet 1/19 to 1/20
 primary-port 1/20
 deploy
 port-name "XXXXX" ethernet 1/19
 port-name "XXXXX" ethernet 1/20
!
esi XXXX encapsulation cvlan
vlan 170 name XXXXX
 tagged ethe 1/19 to 1/20
 router-interface ve 170
 spanning-tree priority 65535
!
ip multicast-routing
!
router ospf
 area 105
 auto-cost reference-bandwidth 1000
 default-passive-interface
 redistribute connected
 log all
!
interface ethernet 1/20
 port-type customer-edge
 enable
 cluster-l2protocol-forward enable
!
interface ve 170
 port-name Core_OSPF_Peer
 ip ospf area 105
 ip ospf dead-interval 60
 ip ospf active
 ip ospf priority 0
 ip ospf mtu-ignore
 ip address 1.1.1.2/30
 ip directed-broadcast
 no ip redirect
 ip mtu 1500
!


Cisco 6509:

interface Port-channel52
 description Brocade Uplink to XXXXXXX Layer 3
 switchport
 switchport trunk encapsulation dot1q
 switchport trunk allowed vlan 1,170
 switchport mode trunk
 mls qos trust dscp
 port-channel port hash-distribution adaptive
!
vlan 170
 name BGP_Peer-Link_1
!
interface GigabitEthernet1/1/13
 switchport
 switchport trunk encapsulation dot1q
 switchport trunk allowed vlan 1,170
 switchport mode trunk
 mls qos trust dscp
 channel-group 52 mode active
!
interface GigabitEthernet2/1/13
 switchport
 switchport trunk encapsulation dot1q
 switchport trunk allowed vlan 1,170
 switchport mode trunk
 mls qos trust dscp
 channel-group 52 mode active
!
interface Vlan170
 description OSPF Peer-Link to XXXXXXX
 ip address 1.1.1.1 255.255.255.252
 no ip redirects
 ip directed-broadcast
 no ip route-cache
 ip ospf authentication null
 ip ospf hello-interval 15
 ip ospf lls disable
 ip ospf mtu-ignore
!
router ospf 105
 router-id X.X.X.X
 log-adjacency-changes
 auto-cost reference-bandwidth 1000
 nsf
 area 105 authentication
 redistribute connected subnets tag 110
 redistribute static subnets tag 110
 network 1.1.1.1 0.0.0.0 area 105
 default-information originate always
!





Occasional Contributor
Posts: 5
Registered: ‎09-11-2014

Re: My Brocade to Cisco OSPF connection is flapping

Debug IP OSPF ADJ:

Brocade:

SYSLOG: <191>Sep 11 14:51:22 NXS-BNADC-INT-RTR1 Sep 11 14:51:22 OSPF: send hello on area 105 interface 1.1.1.2

SYSLOG: <191>Sep 11 14:51:24 NXS-BNADC-INT-RTR1 Sep 11 14:51:24 OSPF: Neighbor 1.1.1.1 went down due to inactivity timer

SYSLOG: <191>Sep 11 14:51:24 NXS-BNADC-INT-RTR1 Sep 11 14:51:24 OSPF: ospf_timer: execute_ospf_neighbor_state_machine - INACTIVITY_TIMER sptr_neighbor->state = 8

SYSLOG: <191>Sep 11 14:51:24 NXS-BNADC-INT-RTR1 Sep 11 14:51:24 OSPF: Neighbor 1.1.1.1, int v170,  state FULL processing event INACTIVITY_TIMER

SYSLOG: <191>Sep 11 14:51:24 NXS-BNADC-INT-RTR1 Sep 11 14:51:24 OSPF: neighbor 1.1.1.1 down event 11


Cisco:

.Sep 11 14:57:41: OSPF: Cannot see ourself in hello from <Brocade Router-id> on Vlan170, state INIT




SH IP OSPF INT <interface>:

Brocade:

ve 170 admin up, oper up, ospf enabled, state up
     IP Address 1.1.1.2, Area 105
     Database Filter: Not Configured
     State active(default passive) DR-OTHER, Pri 0, Cost 1, Options 2, Type broadcast Events 21
     Timers(sec): Transmit 1, Retrans 5, Hello 15, Dead 60
     DR:  Router ID <Cisco router-ID>    Interface Address 1.1.1.1
     BDR: Router ID 0.0.0.0           Interface Address 0.0.0.0
                     Packets Received        Packets Sent
     Hello                          7                  29
     Database                     245                 252
     LSA Req                        6                  35
     LSA Upd                       90                  33
     LSA Ack                       10                  45
     No Packet Errors!
     Neighbor Count = 1, Adjacent Neighbor Count= 1
     Neighbor:         1.1.1.1 [id <Cisco router-ID>] (DR)
     Authentication-Key: None
     MD5 Authentication: Key None, Key-Id None, Auth-change-wait-time 300


Cisco:

Vlan170 is up, line protocol is up
  Internet Address 216.153.66.21/30, Area 105
  Process ID 105, Router ID 216.153.21.230, Network Type BROADCAST, Cost: 1
  Transmit Delay is 1 sec, State DR, Priority 1
  Designated Router (ID) 216.153.21.230, Interface address 216.153.66.21
  No backup designated router on this network
  Timer intervals configured, Hello 15, Dead 60, Wait 60, Retransmit 5
    oob-resync timeout 60
    Hello due in 00:00:05
  Does not support Link-local Signaling (LLS)
  Cisco NSF helper support disabled
  IETF NSF helper support enabled
  Index 5/5, flood queue length 0
  Next 0x0(0)/0x0(0)
  Last flood scan length is 12, maximum is 40
  Last flood scan time is 0 msec, maximum is 1108 msec
  Neighbor Count is 1, Adjacent neighbor count is 1
    Adjacent with neighbor 207.65.6.11
  Suppress hello for 0 neighbor(s)

Occasional Contributor
Posts: 5
Registered: ‎09-11-2014

Re: My Brocade to Cisco OSPF connection is flapping

I modified the OSPF timer to see is the problem followed and it does.  I can only think that the Brocade is not able to communicate via multicast.

 

Brocade:

 

SSH@XXXXXXXXX#ping 224.0.0.5
Sending 1, 16-byte ICMP Echo to 224.0.0.5, timeout 5000 msec, TTL 64
Type Control-c to abort
Request timed out.
No reply from remote host.

 

 

Occasional Contributor
Posts: 5
Registered: ‎09-11-2014

Re: My Brocade to Cisco OSPF connection is flapping

I have found the solution.  The issue involves the use of and ESI container and the ability of the ESI to allow multicast traffic.  Within the ESI you can configure multicast-flooding, but I was not able to test as this device is in production and this change does not go into effect without a reboot. I pealed the vlan out of the ESI and rebuilt it.  This seems to have resolved the issue. 

Occasional Contributor
Posts: 9
Registered: ‎07-23-2014

Re: My Brocade to Cisco OSPF connection is flapping

Before connect to your Cisco OSPF, you need to know more about your Cisco 6509 switch detailed for easy connecting.

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