Active route
The matched prefix, protocol, preference, next-hop and outgoing interface are shown when the router has a route.
Tool
Looking Glass BGP
Checks the active BGP routing path in inet.0 or inet6.0 for an IP address or prefix.
BGP and routing
Looking Glass DataHouse: active BGP path for IPv4 and IPv6
Looking Glass shows how a DataHouse router sees the route to a submitted IP address or prefix. The output focuses on the active BGP path, AS path, next-hop and traceroute hops with AS information where available.
AS path
AS path helps identify the sequence of autonomous systems visible to BGP.
Traceroute with AS data
For a single public IP, traceroute hops are enriched with AS numbers and operator names when possible.
Looking Glass input rules
- Only a public IPv4 address, IPv6 address or CIDR prefix is accepted.
- Bogons, private ranges, multicast and invalid addresses are rejected.
- The user cannot submit arbitrary Junos commands.
- For prefixes, the tool shows BGP route data and does not run traceroute.
- The command is limited to inet.0 or inet6.0 active path.
Safety limits
The form accepts only a public IP address or CIDR prefix. IPv4 is checked in inet.0, IPv6 in inet6.0 and only the active path is displayed.
FAQ: Looking Glass
What does Looking Glass show?
It shows the active BGP path for the submitted IP address or prefix in inet.0 or inet6.0.