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Multiple Switch and Multiple VLAN

Created: Jul 10, 2019 02:14:49Latest reply: Jul 10, 2019 07:19:02 327 4 0 0
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Huawei Experts,

Please sugget which protocol require (like RRPP , SEP ) to avoid loop

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chenhui
Admin Created Jul 10, 2019 07:19:02 Helpful(0) Helpful(0)

@M_Muthu Hi,
It's hard to make the decision which anti-loop protocol should be enabled from your topology.
There are advantages for the each anti-loop protocol.
By the way, the topology you porvided is a little comlicated, and there is quite a few link rings, in my opinion, maybe the SEP is the best way.
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jason_hu
jason_hu Admin Created Jul 10, 2019 03:08:05 Helpful(0) Helpful(0)

Hi,M_Muthu
The Ethernet loop avoids technical scenarios:SEP,RRPP,STP,SEP+MSTP,SEP+SmartLink








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orlan_ortiz
orlan_ortiz Created Jul 10, 2019 03:59:24 Helpful(0) Helpful(0)

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wissal
wissal MVE Created Jul 10, 2019 06:19:28 Helpful(0) Helpful(0)

HI,

Generally, redundant links are used to connect an Ethernet switching network to an upper-layer network to provide link backup and enhance network reliability. The use of redundant links, however, may produce loops, causing broadcast storms and rendering the MAC address table unstable. As a result, communication quality deteriorates, and services may even be interrupted. SEP can be deployed on the ring network to eliminate loops and restore communication if a link fault occurs.

In this example, you can configure SEP at the access layer to implement redundancy protection switching and configure the topology change notification function on an edge device in a SEP segment. This enables an upper-layer network to detect topology changes in a lower-layer network in time.

Figure 1 Hybrid rings running SEP and RRPP 
fig_dc_cfg_sep_002802.png

In Figure 1, multiple Layer 2 switching devices at the access layer and aggregation layer form a ring network to access the core layer. RRPP has been configured at the aggregation layer to eliminate loops. In this case, SEP needs to run at the access layer to implement the following functions:

  • Eliminates loops when there is no faulty link on the ring network.
  • Rapidly restores communication between nodes when a link fault occurs on the ring network.
  • Provides the topology change notification function on an edge device in a SEP segment. This function enables an upper-layer network to detect topology changes in a lower-layer network in time.

    After receiving a message indicating the topology change in a lower-layer network, a device on an upper-layer network sends TC packets to instruct other devices to delete original MAC addresses and learn new MAC addresses after the topology of the lower-layer network changes. This ensures uninterrupted traffic forwarding.

Thanks
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chenhui
chenhui Admin Created Jul 10, 2019 07:19:02 Helpful(0) Helpful(0)

@M_Muthu Hi,
It's hard to make the decision which anti-loop protocol should be enabled from your topology.
There are advantages for the each anti-loop protocol.
By the way, the topology you porvided is a little comlicated, and there is quite a few link rings, in my opinion, maybe the SEP is the best way.
View more
  • x
  • convention:

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