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New Member

BFD not working logical bundle-ethernet

I was wondering what could be wrong if i'm trying to configure BGP BFD under logical bundle-ethernet.

here's the scenario in short words

i'm establishing a B2B VRF between 2 GSR routers with IOS-XR 4.2.3 . BGP peering is established over B2B vrfs between the two GSRs over bundle-ethernet subinterfaces.

the problem is that BFD isn't coming up.

BFD over logical bundles is supported and i managed to configure it a few months ago. but now it won't.

any help is appreciated

Everyone's tags (7)
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New Member

BFD not working logical bundle-ethernet

Hi

I am fighting with the same case: CRS-2-Nexus via bundle + BGP and still no success

I have got 4.2.4 on CRS-3 - I am goint to open the case for this issue. It looks for me like a bug in 4.2.0 software.

Check the output form sho bfd session.

Do you have the same ADMIN DOWN  status ?

CRS:

interface Bundle-Ether1000

bfd address-family ipv4 destination 1.1.1.2

ipv4 address 1.1.1.1 255.255.255.252

bfd

!

interface Bundle-Ether1000

echo disable

!

router bgp 65000

neighbor 1.1.1.2

remote-as 65400

bfd fast-detect

bfd multiplier 3

bfd minimum-interval 500

!

!

!

NEXUS:

feature bfd

interface port-channel1000

bfd interval 500 min_rx 500 multiplier 3

no bfd echo

router bgp 65400

neighbor 1.1.1.1 remote-as 65000

   bfd

And still I see on CSR:

RP/0/RP0/CPU0:#sho bfd session

Mon Nov 25 13:34:11.755 CET

Interface           Dest Addr           Local det time(int*mult)      State

                                   Echo             Async

------------------- --------------- ---------------- ---------------- ----------

BE1000             1.1.1.2    0s               0s               ADMIN DOWN

BFD not working logical bundle-ethernet

I believe BFD over logical interfaces is not needed

So:

interface Bundle-Ether1000

no bfd address-family ipv4 destination 1.1.1.2

no bfd

Registring BFD with BGP as you did already should be enough:

router bgp 65000

neighbor 1.1.1.2

remote-as 65400

  bfd fast-detect

    !

!

bfd multiplier 3

bfd minimum-interval 500

adam

adam
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