[c-nsp] Unable to create BFD session on C6500

[Murat Kaipov]

Hello Marco.
Now I don't have any idea. But in my opinion there is issue on me3600. I haven't any proof, but it is just my experience with ME series switches. If you can, check this theory. Connect gi2/7 on cat6500 to another box and try setup ospf with bfd in some another ospf process. You can do it for me3600 too.
Thank you. I really have no other idea.
Murat

Sent from my iPad

>> 12 дек. 2014 г., в 11:28, Marco Marzetti <marco at lamehost.it> написал(а):
>> 
>> On 11/12/2014 21:28, Мурат Каипов wrote:
>> Hello Marco.
>> Can you provide what type of Line Cards you use and check your Cat6500
>> for this restrictions:
>> 
>>  * Cisco Catalyst 6500 series switches support up to 100 BFD sessions
>>    with a minimum hello interval of 50 ms and a multiplier of 3. The
>>    multiplier specifies the minimum number of consecutive packets that
>>    can be missed before a session is declared down.
>>  * If SSO is enabled on a dual RP system, the following limitations apply:
>>      o The maximum number of BFD sessions supported is 50.
>>      o The minimum hello interval is 500 ms with a multiplier of 3 or
>>        higher.
>>      o If EIGRP is enabled, the maximum number of BFD sessions
>>        supported is reduced to 30.
>>      o Echo mode is supported on Distributed Forwarding Cards (DFCs) only.
>>  * BFD SSO is supported on Cisco Catalyst 6500 series switches using
>>    the E-chassis and 67xx line cards only. Centralized Forwarding Cards
>>    (CFCs) are not supported.
>>  * To enable echo mode the system must be configured with the no ip
>>    redirects command.
>>  * During the In Service Software Upgrade (ISSU) cycle the line cards
>>    are reset, causing a routing flap in the BFD session.
> 
> 
> Hello,
> 
> Gi2/7 is on a very old line card: WS-X6724-SFP
> 
> We're not running SSO on that box and the number of session is a lot less the 100.
> 
> Also note that C6500_1 is not able to create the BFD session on the interface Gi2/7 even if we disable the protocol on ME3600X.
> 
> 
> ME3600X(config)#interface GigabitEthernet0/24
> ME3600X(config-if)#no  bfd template bfd-core
> ME3600X(config-if)#do sho bfd neig
> 
> IPv4 Sessions
> NeighAddr                              LD/RD         RH/RS     State     Int
> 192.0.2.202                             8/199        Up        Up  Gi0/23
> ME3600X(config-if)#
> 
> 
> C6500_1(config-if)#no  bfd interval 300 min_rx 300 multiplier 3
> C6500_1(config-if)# bfd interval 300 min_rx 300 multiplier 3
> Dec 12 09:17:57.360: BFD-DEBUG EVENT: bfd_session_create failed, 6
> C6500_1(config-if)#
> 
> 
> So i guess that something went wrong on that box.
> 
> Do You have any ideas?
> 
> Thank You
> 
> 
> Hello,
> 
> Gi2/7 is on a very old line card: WS-X6724-SFP
> 
> We're not running SSO on that box and the number of session is a lot less the 100.
> 
> Also note that C6500_1 is not able to create the BFD session on the interface Gi2/7 even if we disable the protocol on ME3600X.
> 
> 
> ME3600X(config)#interface GigabitEthernet0/24
> ME3600X(config-if)#no  bfd template bfd-core
> ME3600X(config-if)#do sho bfd neig
> 
> IPv4 Sessions
> NeighAddr                              LD/RD         RH/RS     State     Int
> 192.0.2.202                             8/199        Up        Up  Gi0/23
> ME3600X(config-if)#
> 
> 
> C6500_1(config-if)#no  bfd interval 300 min_rx 300 multiplier 3
> C6500_1(config-if)# bfd interval 300 min_rx 300 multiplier 3
> Dec 12 09:17:57.360: BFD-DEBUG EVENT: bfd_session_create failed, 6
> C6500_1(config-if)#
> 
> 
> So i guess that something went wrong on that box.
> 
> Do You have any ideas?
> 
> Thank You