From: Joseph Ezerski (jezerski@xxxxxxxxxxxx)
Date: Mon Dec 03 2001 - 13:20:51 GMT-3
The broadcast command at the end of a Frame map statement allows dynamic
protocols like OSPF to function over a frame-relay cloud.
Here is an excerp from that page:
The broadcast keyword provides two functions: it forwards broadcasts when
multicasting is not enabled, and it simplifies the configuration of OSPF for
nonbroadcast networks that will use Frame Relay.
The broadcast keyword might also be required for some routing protocols-for
example, AppleTalk-that depend on regular routing table updates, especially
when the router at the remote end is waiting for a routing update packet to
arrive before adding the route.
By requiring selection of a designated router, OSPF treats a nonbroadcast,
multiaccess network such as Frame Relay in much the same way as it treats a
broadcast network. In previous releases, this required manual assignment in
the OSPF configuration using the neighbor interface router command. When the
frame-relay map command is included in the configuration with the broadcast
keyword, and the ip ospf network command (with the broadcast keyword) is
configured, there is no need to configure any neighbors manually. OSPF will
now automatically run over the Frame Relay network as a broadcast network.
(See the ip ospf network interface command for more detail.)
Here is a link that simply describes this.
http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/121cgcr/wan_
r/wrdfrely.htm#xtocid2753542
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Duy Nguyen
Sent: Monday, December 03, 2001 7:34 AM
To: Robert.McCallum@let-it-be-thus.com; tonyblair@etang.com;
ccielab@groupstudy.com
Subject: RE: two commands comparison
Since we are on this topic, what's the reason for the broadcast statement at
the end after the frame mapping? To broadcast the local dlci to remote? Or
to broadcast the local to the local? I've had a situation where the local
int couldn't ping itself even with broadcast statement. One router out of 5
that doesn't pick up pings on its own int. Debug shows encap failed. All
routers has same conf.
Absolutely Positively Continuously Sincerely,
Duy Nguyen CCNP
net_port@hotmail.com
Cell (817) 707-7451
>From: "McCallum, Robert" <Robert.McCallum@let-it-be-thus.com>
>Reply-To: "McCallum, Robert" <Robert.McCallum@let-it-be-thus.com>
>To: "'???'" <tonyblair@etang.com>, ccielab@groupstudy.com
>Subject: RE: two commands comparison
>Date: Mon, 3 Dec 2001 12:56:19 -0000
>
>technically speaking nothing will matter if you do both, however in my
>opinion if you did this in the lab exam then I (again personally) would
>give you no points for this. When you do a map it binds the dlci to the
>interface exactly the same way in doing you frame in dlci number does. The
>same
>goes for the broadcast statement on the maps. If its not needed and it is
>put in then again I would give no points for it.
>HTH
>
>-----Original Message-----
>From: tonyblair@etang.com [mailto:tonyblair@etang.com]
>Sent: 03 December 2001 12:33
>To: ccielab@groupstudy.com
>Subject: two commands comparison
>
>
>hi all,
>
>router(config-if)#frame-relay interface dlci 25
>router(config-if)#frame-relay map ip 1.1.1.1 25
>
>
>what is the association between them,i remembered that they were exclusive
>to each other,right?
>what if I config both of them on the same interface?
>
>Many Thanks.
This archive was generated by hypermail 2.1.4 : Thu Jun 13 2002 - 10:32:36 GMT-3