Technical data

Using Technician Interface Software
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303561-A Rev 00
The column headings in screens invoked by the ip command have the following
meanings:
* (asterisk) Indicates routes actively used by IP, versus routes not currently
used. (The asterisk appears only when you specify the all
routes [-A] flag.)
Adv Router Indicates the OSPF router ID of the advertisement's originator.
For router links advertisements, this field is identical to the
Link State ID field. The network’s designated router originates
network link advertisements. Area border routers originate
summary link advertisements. AS boundary routers originate
AS external link advertisements.
Age Number of seconds since this route was last updated or
verified to be correct. The meaning of “too old” depends on
the routing protocol specified under “Proto.” Note that RIP
and EGP routes are refreshed only on a slot that receives a
route update. Route ages may be different on each slot for this
reason.
ASE Fwd Addr An address for forwarding packets to a destination external to
the AS, but not accessible through an AS boundary router.
Cost Number of hops to reach the destination.
Link State ID
(LSID)
Indicates the piece of the routing domain that the
advertisement describes, as follows:
If LS Type = 1, LSID = the originating router's router ID.
If LS Type = 2, LSID = the IP interface address of the
network's designated router.
If LS Type = 3, LSID = the destination network's IP address.
If LS Type = 4, LSID = the router ID of the AS boundary
router.
If LS Type = 5 , LSID = the destination network's IP address.
Loc Pref A discretionary attribute used by a BGP speaker to inform
other BGP speakers in its own autonomous system of the
originating speaker's degree of preference for an advertised
route.