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RR Reflection rules

RR Reflection rules

Created: Jul 26, 2020 09:25:53Latest reply: Sep 24, 2021 08:46:09 556 6 1 0 0
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Hi,


As we know the IBGP route advertisement rule "route learned from IBGP peer will not advertise to IBGP peer "(split-horizon rule) and 


peering b/w RR & non-clients is common IBGP  Peering.then what about below statements?


When route learned from a client is advertised to all non-clients & other clients of RR.


peering b/w RR, clients & non-clients is IBGP then why advertise IBGP route of a client to non-clients IBGP peer?


actually my focus point is peering b/w RR & non-clients is common Peering, not reflection peering then why to advertise IBGP route to non-clients.


Thanks

BGPrr

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chenhui
Admin Created Jul 26, 2020 09:46:11

Hi,
For non-client or client of BGP peer, there is no differece for them. Only the RR which realizes the difference between the two different types of BGP peer.
Suppose that the IBGP routes only reflectes btween the RR clients, then, the configuration workload will be doubled as current scenario. Anyway, this is the aim of the designing, I think, just definition, and there is no need to pay attentation on such kind of doubts.
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LSA
LSA Created Jul 26, 2020 17:53:08 (0) (0)
Thanks for reply @chenhui ,,,For non-client or client of BGP peer,there is no differece for them....then what difference b/w client & non-clients?......with client reflection peering & non client common peering but whats its advantage in operation?Thanks  
chenhui
chenhui Reply LSA  Created Jul 27, 2020 00:41:19 (0) (0)
I mean for a non-client or client of BGP peer, they don't know whether they are RR client or not, cause the RR configuration only configured on the RR itself. They just take the RR router as a common IBGP peer. As you know, the horizon split will prevent the IBGP routes from being spreaded between the IBGP peers, in which scenario, the routes would be no more transmitted to the remote IBGP peers.  
(0) (0)
from 5#
chenhui
chenhui Admin Created Sep 24, 2021 08:46:09

For more RR information, you are recommended to refer to BGP Fundamentals 21-BGP RR part 1 - Huawei Enterprise Support Community

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little_fish
little_fish Admin Created Jul 26, 2020 09:31:32

hi we are working on it
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little_fish
little_fish Admin Created Jul 26, 2020 09:32:10

hi we areworking on it
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4#
chenhui
chenhui Admin Created Jul 26, 2020 09:46:11

Hi,
For non-client or client of BGP peer, there is no differece for them. Only the RR which realizes the difference between the two different types of BGP peer.
Suppose that the IBGP routes only reflectes btween the RR clients, then, the configuration workload will be doubled as current scenario. Anyway, this is the aim of the designing, I think, just definition, and there is no need to pay attentation on such kind of doubts.
View more
  • x
  • convention：

LSA
LSA Created Jul 26, 2020 17:53:08 (0) (0)
Thanks for reply @chenhui ,,,For non-client or client of BGP peer,there is no differece for them....then what difference b/w client & non-clients?......with client reflection peering & non client common peering but whats its advantage in operation?Thanks  
chenhui
chenhui Reply LSA  Created Jul 27, 2020 00:41:19 (0) (0)
I mean for a non-client or client of BGP peer, they don't know whether they are RR client or not, cause the RR configuration only configured on the RR itself. They just take the RR router as a common IBGP peer. As you know, the horizon split will prevent the IBGP routes from being spreaded between the IBGP peers, in which scenario, the routes would be no more transmitted to the remote IBGP peers.  
(0) (0)
5#
chenhui
chenhui Admin Created Sep 24, 2021 08:46:09

For more RR information, you are recommended to refer to BGP Fundamentals 21-BGP RR part 1 - Huawei Enterprise Support Community

View more
  • x
  • convention：
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