ERPS Sub-Ring not being formed between S5700 switches

Latest reply: Mar 21, 2018 10:08:39 1676 3 0 0

The full sub-ring is not being formed in order to have one RPL in sub-ring. The major rings are woking the RPLs are configured for both rings.

In this scenario we assume we are aware of configuring the basic ERPS configuration.

The intersecting switch Nodes (LSW 3 - 4 - 5 - 6) , are configured in order to create Major rings and Sub-rings, see below configuration:


stp region-configuration<?xml:namespace prefix = "o" />

instance 1 vlan 1 to 4093

active region-configuration             

#

erps ring 1

control-vlan 4080

protected-instance 1

version v2

#

erps ring 2

control-vlan 4081

protected-instance 1

sub-ring

version v2



 See below network topology for further understanding.

5974eb4151604c359673c898979e18ab

Sub-ring is wanted to be formed between LSW 3 - 4 - 5 - 6, but from some cause is no being formed, the cause why is not being formed is because R-APS PDUs are not being exchanged between all the Sub-ring Nodes, this will result in not being able to set the RPL for the Sub-ring.

        -The R-APS PDUs sent by LSW3 can't reach LSW4, same behavior from LSW4 side.

        -The R-APS PDUs sent by LSW5 can't reach LSW6, same behavior from LSW6 side.

        -The R-APS PDUs can be exchanged on the Link between LSW3 <->LSW5,  same behavior for the Link between LSW4 <-> LSW6.


Siwtches LSW 3 - 4 - 5 - 6 are the intersecting Nodes of the rings, Major and Sub-ring rings, these we result in Common links: 

        -Major ring 1 and Sub-ring will have the common link between LSW3 - LSW4 (GE 0/0/2 - Ge0/0/2)

        -Major ring 2 and Sub-ring will have the common link between LSW5 - LSW6 (GE0/0/2 - GE0/0/2)

By default the Common links are appart from Major Rings.

  • x
  • convention:

ms.america
Created Apr 25, 2017 08:58:44 Helpful(0) Helpful(0)

By default the transmission of R-APS PDUs for a Sub-ring is in NVC (non virtual-channel).

          -in NVC the R-APS PDUs are not being injected in the Major Ring and the RPL of the Sub-ring can forward ERPS packets and data packets, because the Common links are appart of Major Rings obviously the Nodes of the Common Links can't forward the SUb-Ring ERPS packets.

          -this problem happens when the upper topology is encountered, more exacly when the Sub-ring has two common links with major rings.

In order to avoid this problem on all Nodes of the Sub-ring, under Sub-ring configuration we need to set the Transmission in VC(virtual-channel).

          -in VC the ERPS packets of the sub-ring are being forwarded by the Nodes, where both rings are configured, into Major rings, and in this mode the RPL of the Sub-ring will block the ERPS packets, see below  configuration:


 erps ring 2

control-vlan 4081<?xml:namespace prefix = "o" />

protected-instance 1

sub-ring

virtual-channel enable    

version v2


For the interfaces of the Nodes which are forming the Common Links need to have configuration for both ERPS ring (major and Sub-ring), se below confiuration:

  

interface GigabitEthernet0/0/2                                                            

description "Uplink Pijnacker"

port link-type trunk

port trunk allow-pass vlan 3400 3408 3450 3455 to 3456 3461 to 3462 3464 to 3465 3773 4080 4093

stp disable

erps ring 1

erps ring 2

  • x
  • convention:

jvjoy
Created Mar 9, 2018 07:08:41 Helpful(0) Helpful(0)

Posted by ms.america at 2017-04-25 08:58 By default the transmission of R-APS PDUs for a Sub-ring is in NVC (non virtual-channel).       ...
stp region-configuration
instance 1 vlan 2 to 8 16 50 52 108 to 109 119 to 120 124 129 132 134 to 136
instance 1 vlan 151 to 161 178 to 181 213 245 248 258 303 to 304 501 600 to 601 605 to 609
instance 1 vlan 776 797 837 980 1167 1288 2124 2133 2189 2222
instance 1 vlan 2543 2990 2992 to 2994 3500
active region-configuration
#
erps ring 1
control-vlan 50
protected-instance 1
description Major-Ring-1
version v2
erps ring 2
control-vlan 52
protected-instance 1
description sub_ring_1
version v2
sub-ring
virtual-channel enable
tc-notify erps ring 1



interface XGigabitEthernet0/0/3
description TO_KANNAPURAM
port link-type trunk
port trunk pvid vlan 3
port trunk allow-pass vlan 2 to 8 50 151 to 161 178 to 181 213 245 248 303 to 304 501 600 to 601
port trunk allow-pass vlan 605 to 606 609 776 797 837 1167 1288
stp disable
erps ring 1
dhcp snooping enable
#
interface XGigabitEthernet0/0/4
description TO_DARMASHALA
port link-type trunk
undo port trunk allow-pass vlan 1
port trunk allow-pass vlan 2 to 8 16 50 151 to 161 178 to 181 213 245 248 258 303 to 304
port trunk allow-pass vlan 501 600 to 601 605 to 606 609 776 797 837 1167 1288
stp disable
erps ring 1 rpl owner
dhcp snooping enable
dhcp snooping trusted



[PDIC_CONTROL_ROOM-XGigabitEthernet0/0/4]erps ring 2
Error: The instance is protected by another ERPS ring.
[PDIC_CONTROL_ROOM-XGigabitEthernet0/0/4]


how can i solve this problem i cant add the second ring as sub ring


Huawei Versatile Routing Platform Software
VRP (R) software, Version 5.170 (S5720 V200R010C00SPC600)
Copyright (C) 2000-2016 HUAWEI TECH CO., LTD
HUAWEI S5720-36C-EI-AC Routing Switch uptime is 0 week, 0 day, 0 hour, 44 minutes

ES5D2T32C002 0(Master) : uptime is 0 week, 0 day, 0 hour, 43 minutes
DDR Memory Size : 2048 M bytes
FLASH Memory Size : 344 M bytes
Pcb Version : VER.B
BootROM Version : 020a.0001
BootLoad Version : 020a.0001
CPLD Version : 010e
Software Version : VRP (R) Software, Version 5.170 (V200R010C00SPC600)
PWR1 information
Pcb Version : PWR VER.B
FAN1 information
Pcb Version : NA

  • x
  • convention:

StarOfWest
Created Mar 21, 2018 10:08:39 Helpful(0) Helpful(0)

  • x
  • convention:

“We only get answers to the questions that we ask.” physicist Werner Heisenberg

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