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 Posted: Thu Apr 06, 2006 9:37 am Post subject: point-to-point and frame-relay map command |
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While I was reading through some documentation I found these phrases:
First Phrase
| Quote: | | Layer 3 to layer 2 protocol resolution is not necessary when using point-to-point interfaces, since the only destination for any traffic sent out a point-to-point interface is the device residing on the other end of the link. This applies to Frame-Relay point-to-point interfaces,ATM point-to-point interfaces, and dialer interfaces in ISDN. |
Second Phrase
| Quote: | | In the case of Frame-Relay, a static layer 3 to layer 2 protocol mapping is defined through the frame-relay map [protocol] [protocol_address] [dlci] [broadcast] interface command. Since layer 3 to layer 2 protocol resolution is not required on point-to-point interfaces, the above command only applies to multipoint interfaces |
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Third Phrase
| Quote: |
12.2 Point-to-Point----Title
1- Using only physical interfaces a Frame Relay connection between R33 and R44.
2- Do not use dynamic layer 3 to layer 2 mappings over this Frame Relay connection.
In his diagram R33 S1/0 (190.34.34.33 and DLCI 333) connected to R44 S0/0 (190.34.34.34 and DLCI 444), point-to-point link. In the configuration of his third phrase he used this:
R33:
interface Serial1/0
ip address 190.34.34.33 255.255.255.0
encapsulation frame-relay
frame-relay map ip 190.34.34.34 333 broadcast
no frame-relay inverse-arp
R44:
interface Serial0/0
ip address 190.34.34.34 255.255.255.0
encapsulation frame-relay
frame-relay map ip 190.34.34.33 444 broadcast
no frame-relay inverse-arp
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Queries:
1- Kindly pay attention to the bold words.
2- Regarding to the quoted statement "is not necessary", from phrase one my understanding is this:
I can use "frame-relay map" command with point-to-point but it is not necessary ,,,Am I right in my conculsion ?,,,then I feel it will be contradiction with the quoted statemnet from phrase two when he says:
"Since layer 3 to layer 2 protocol resolution is not required on point-to-point interfaces, the above command only applies to multipoint interfaces".,,,,see word only!!!
3- In the third phrase he used "frame-relay map" command with point-to-point !!!!!!! |
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