BFD between Cisco and Huawei

Hi Steelbule,

On the Cisco device, using BFD for static routes, BFD is needed to configure on interfaces.

1) Cisco BFD uses dynamic negotiation to negotiate discriminators.

2) Cisco BFD considers that the BFD session is a single-hop BFD session, TTL= 255.

For Huawei device: 

1) The discriminator parameters cannot be manually specified. You need to set the auto parameter to perform automatic negotiation.

https://support.huawei.com/hedex/hdx.do?docid=EDOC1100007335&id=bfd_bind_peer-ip_source-ip_auto_2&text=bfd%2520bind%2520peer-ip%2520source-ip%2520auto&lang=en

2) The TTL must be the same on both sides. The single-hop BFD must be configured on Huawei. The single-hop BFD must be specified when the outbound interface is specified.

If no outbound interface is specified on Huawei devices, multi-hop detection is used by default, and TTL= 253. In this case, interconnection cannot be performed.

https://support.huawei.com/hedex/hdx.do?docid=EDOC1100007335&id=EN-US_CONCEPT_0177896416&text=What%2520Do%2520the%2520TTL%2520Values%2520255%252C%2520254%252C%2520and%2520253%2520Mean%2520in%2520a%2520BFD%2520Session%253F&lang=en