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MPLS neighbor

Created: Jun 30, 2020 11:56:33Latest reply: Jul 1, 2020 03:33:48 171 6 0 0
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Hello,

In the basic neighbor discovery mechanism, R1 receives Hello packets from R2 through both links. In this case, will R1 and R2 establish two neighbor relationships?  


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Popeye_Wang
Admin Created Jun 30, 2020 11:57:15 Helpful(0) Helpful(0)

Hi,

The Hello packet contains the transport address field. The router uses this field to set up a TCP connection with the peer. By default, the value of the transport address is the same as that of LSR ID. Therefore, only one neighbor relationship is established between R1 and R2.

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Popeye_Wang
Popeye_Wang Admin Created Jun 30, 2020 11:57:15 Helpful(0) Helpful(0)

Hi,

The Hello packet contains the transport address field. The router uses this field to set up a TCP connection with the peer. By default, the value of the transport address is the same as that of LSR ID. Therefore, only one neighbor relationship is established between R1 and R2.

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Sprout
Sprout Created Jun 30, 2020 12:02:03 Helpful(0) Helpful(0)

Posted by Popeye_Wang at 2020-06-30 11:57 Hi,The Hello packet contains the transport address field. The router uses this field to set up a TCP ...
What if the transport address is changed to a physical interface address?
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Prepare%20for%20HCIE%20exam
Popeye_Wang
Popeye_Wang Admin Created Jun 30, 2020 12:06:22 Helpful(0) Helpful(0)

Posted by Sprout at 2020-06-30 12:02 What if the transport address is changed to a physical interface address?
If the transport address is changed to a physical interface address, two TCP connections will be established between R1 and R2. The initialization message sent afterward also carries the LSR-ID. At this time, a TCP connection will be closed.
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alejandrolla
alejandrolla Created Jun 30, 2020 23:01:16 Helpful(0) Helpful(0)

Great idea, thanks MPLS neighbor-3357907-1
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alejandrolla
alejandrolla Created Jun 30, 2020 23:01:27 Helpful(0) Helpful(0)

excellent
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taipm
taipm Created Jul 1, 2020 03:33:48 Helpful(0) Helpful(0)

We have only one relationship between AR1 and AR2.
But under relationship, we have two paths to another peer.
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