Hey Luke Robertson
Oh snap! it was a typo on my end, let me fix that, I meant bme0.0 instead of BCM0, but this interface exists on specific Routing engines for various M series and T series.
https://www.juniper.net/documentation/en_US/junos/topics/concept/interfaces-interface-naming-overview.html
Just to add, I am using an EX4300 ( where I took the output from )
root@ show interfaces terse |except down
Interface Admin Link Proto Local Remote
gr-0/0/0 up up
pfe-0/0/0 up up
pfe-0/0/0.16383 up up inet
inet6
pfh-0/0/0 up up
pfh-0/0/0.16383 up up inet
pfh-0/0/0.16384 up up inet
bme0 up up
bme0.0 up up inet 128.0.0.1/2
128.0.0.4/2
128.0.0.16/2
128.0.0.63/2
And last but not least I gather the following information for you:
These are called permanent interfaces, a permanent interface is any interface that is always present on the router (it cannot be altered). These interfaces can be management interfaces such as Ethernet, software pseudointerfaces such as tunnel interfaces, or fixed-port LAN/WAN interfaces
pd
This Physical Interface Module (PIM) de-encapsulation interface allows a multicast rendezvous point (RP) to process PIM register messages.
pe
This PIM encapsulation interface is used in multicast to create a unicast PIM register message to send to the RP.
ip
This is an IP-over-IP encapsulation interface to create IP-in-IP tunnels.
dsc
This is a discard interface, which can be used to silently discard packets. This is often used to create a choke point for denial of service (DoS) attacks.
tap
This is a virtual Ethernet interface historically used for monitoring on FreeBSD systems. This interface could be used to monitor discarded packets on a router but is no longer officially supported.
PFE
Interface used for internal communication between PFEs.
JSRV stands for Juniper services interface.
This interface is required for Captive portal service on EX platform and is added by DOT1x (Port based Network Access Control).
JSRV interface is a special IFD which is linked to "__juniper_services__.inet" routing table. RPD should ignore any IFD/IFL/IFF messages of this interface.
PFH interfaces are pseudo/virtual interfaces, which represent the PFE Host Processor (the processor hosting the PFE, which is usually the FPC for distributed routers and the SCB/SSB/SFM boards for old single-PFE or centralized forwarding routers). It is used for intra-chassis communication and is not user-configurable.
Regards,
Lil Dexx JNCIE-ENT#863
If this solves your problem, please mark this post as "Accepted Solution" so we can help others too \:)/