Re: [mpls-linux-general] command help

[James R. L. <jl...@mi...>]

On Tue, Feb 21, 2006 at 12:45:33PM +0530, kis...@wi... wrote:
> Hi,
>          In command "ip route add 10.200.19.1/32 via 10.200.19.1 spec_nh =
0x8847 0x2" what do we mean spec_nh=20

spec_nh stands for special nexthop.  spec_nh was my first attempt at buildi=
ng
infrastructure for Ipv4|6 to interact with nexthops that had a different
protocol (IPSEC and MPLS are the two I had in mind).  In mpls-linux 1.950
spec_nh has gone away and the 'shim' system has been implemented.

spec_nh 0x8847 0x2 means special nexthop of type MPLS (0x8847 is the ethern=
et
protocol ID for MPLS unicast) and a MPLS NHLFE key of 0x2.

> When I give command "mpls nhlfe show? i get the following:
>  NHLFE entry key 0x00000002 mtu 1496 propagate_ttl
>    push gen 11111 set eth0 ipv4 10.200.19.1 (0 bytes, 0 pkts, 0 dropped)
> What do mean mtu 1496 propagate_ttl=20

MTU is the maximum packet size that can be sent on the NHLFE.  propagate_ttl
means that we copy the TTL from the IPv4|6 header if this node is acting
as a ingress LER.

> The "ip rote show "gives the following:
>    10.200.19.1 via 10.200.19.1 dev eth0 spec_nh 0x8847 0x2
>    192.168.2.9/24 dev eth0 scope link
> 10.200.19.1/24 dev eth0 proto kernel scope link src 10.200.19,.1=20
> 127.0.0.0/8 dev lo scope link
> what do mean scope link?
>=20
> Also what are the commands to create table? and access the table?
> Sorry for disturbing by these questions. As Iam new to these please help =
me.

Your last two questions are not specific to mpls-linux and can easily be
found via google or the like. (hint "lartc")

>=20
> Regards,
> Kishor=20
>=20
>=20
>                          =20

--=20
James R. Leu
jl...@mi...