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New Member

datalink layers and broadcasts

Hi all, is it possible to send broadcasts over other datalink types than ethernet ?

5 REPLIES
Silver

Re: datalink layers and broadcasts

do you mean over other LAN protocols or WAN protocols ?

New Member

Re: datalink layers and broadcasts

I mean other datalinks like, hdlc,ppp, frame relay etc ?

Silver

Re: datalink layers and broadcasts

yes it is possible to send :

-layer 2 broadcast if you are bridging the wan

-layer 3 broadcast if you add the key word broadcast at the end of the ip mapping for example in framerelay or x25.

x25 map ip 192.168.21.1 (remote wan) 123456 (remote x25 address) broadxast

New Member

Re: datalink layers and broadcasts

can routers forward layer 3 broadcasts ?

is it turned off by default ?

Silver

Re: datalink layers and broadcasts

this not a feature that we turn on or off, but it is related to protocol itself. as i sai this possible for example with fr or x25.

in other hand, you can use "ip helper-address" to forward some particular broadcasts such as dhcp request... to a particular server in remote site>

http://www.cisco.com/en/US/docs/ios/12_3t/ip_addr/command/reference/ip1_i1gt.html#wp1169356

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