From: michael robertson (michael_w_2ca@xxxxxxxx)
Date: Fri Feb 08 2002 - 01:26:03 GMT-3
Hi,
From Jeff's book, we can see that routing packet (
routed protocol) will use interface route-map and for
routing process, it seems that it's only used in
redistribution and routing tag? AM I wrong? I know BGP
will use redistricution quite often. But still
confusing. ANy more explanation?
regards
michael
--- Alan <groupstudy@x263.net> wrote:
> you misunderstood me.
> Routing packets is a bit different from manipulating
> routing information.
> When routing packets, we check the source add and
> dest add. So we might use standard acl to match
> source add, and use extended acl to match both.
> when we are talking about routing info, we care
> destination network and nexthop add. say
> to network 2.2.2.0/24, go next hop 1.1.1.1.
> We use "match ip add " to match 2.2.2.0 and use
> "match ip next-hop" to match 1.1.1.1.
>
>
>
> ----- Original Message -----
> From: "michael robertson" <michael_w_2ca@yahoo.ca>
> To: <ccielab@groupstudy.com>
> Cc: "Alan" <groupstudy@x263.net>
> Sent: Friday, February 08, 2002 11:49 AM
> Subject: Re: route map question
>
>
> > HI,
> >
> > about the question 2, you mean the route-map will
> use
> > destination address? I think it different. If you
> see
> > all the routing protocol format, the advertisint
> > router's update has a field that includes the
> > destination he can reach, in this case, does this
> mean
> > that when a router get a packet (suppose the
> router
> > enable a route map), the router then will check
> this
> > field ( the updated destination ip address field)
> for
> > the route-map to work?
> >
> >
> > regards
> >
> > michael
> >
> >
> > --- Alan <groupstudy@x263.net> wrote:
> > > A1: if you want to policy route packets, you
> should
> > > enable route-map in an interface.
> > > while if you want to manipulate the
> routing
> > > information, you use it in a routing process.
> > >
> > > A2: the same question as A1. Route-map has two
> > > places to take effects.
> > > when route-map is used in policy routing, you
> can
> > > use standard or extended ACL to match both
> source
> > > and destination address.
> > > when route-map is used with redistribution,
> "match
> > > ip add " matches routes that have a dest add
> > > specified by ACL. Only match one add (dest add),
> so
> > > we use standard acl.
> > >
> > > Check Jeff Doyle, it helps a lot.
> > >
> > > ----- Original Message -----
> > > From: "michael robertson"
> <michael_w_2ca@yahoo.ca>
> > > To: <ccielab@groupstudy.com>
> > > Sent: Friday, February 08, 2002 9:41 AM
> > > Subject: route map question
> > >
> > >
> > > > Hi, Group,
> > > >
> > > > I have some question concerning route map.
> > > >
> > > > Question 1:
> > > >
> > > > when should i enable a route-map in an
> interface
> > > and
> > > > when sould i use it in a routing process.
> > > >
> > > >
> > > > Question 2.
> > > >
> > > >
> > > > If I say
> > > >
> > > > route-map ccie permit 10
> > > >
> > > > match ip add 1
> > > >
> > > >
> > > > this 1 is access-list 1
> > > >
> > > >
> > > >
> > > > then I will call access-list 1, but
> access-list
> > > will
> > > > use source ip address( i.e. standard
> access-list).
> > > My
> > > > question is what source address this is. if
> you
> > > look
> > > > from the packet format, will this the source
> IP
> > > > address (i.e. for ping, telnet, ftp etc) or
> what's
> > > > this?
> > > >
> > > > also in a routing process, you can also use a
> > > standard
> > > > access-list to specify a routing update ( for
> > > route
> > > > ridistribution etc.), then it will be routing
> > > > protocol-specific. i.e. in OSPF update, LSA
> field
> > > has
> > > > a LINK ID, will the route map will call the
> > > > access-list 1, and access list will check the
> Link
> > > ID?
> > > >
> > > >
> > > > as always, any help will be greatly
> appreciated
> > > >
> > > >
> > > > regards
> > > >
> > > >
> > > > michael
> > > >
> > > >
> > > >
> > > >
> > > >
> > >
> >
>
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