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ERPS - switch stuck in pending state


Hello Hub Community,

I have an issue with an ERPS-based network topology composed by 4 switched.

The 4 switch are connected in a squared topology:

SW4 -- SW1

| |

SW3 -- SW2

Basically, SW1 is the RPL owner and SW2 its neighbor.

The RPL port is blocked and there are no failure conditions.

SW3 is stuck in Pending Operational state and there is no way to make it change it.

SW1, SW2, SW4 are in Idle state.

Does anyone have any idea of how to fix this?

Follows a cat&paste of the ERPS status of the ring:

#SW1: east port to SW2, west port to SW4

Summit-PC-1.5 # show erps "main_ring01-04"

Name: main_ring01-04
Operational State: Idle Node Type: RPL Owner, Revertive
Configured State : Enabled

East Ring Port : 1 CFM Group: L0102 Status: Unblocked
West Ring Port : +2 CFM Group: RPL0104 Status: Blocked

Periodic timer interval: 5000 millisec (Enabled)
Hold-off timer interval: 0 millisec (Enabled)
Guard timer interval : 500 millisec (Enabled)
WTB timer interval : 5500 millisec (Enabled)
WTR timer interval : 10000 millisec (Enabled)

Ring MD Level : ----
Notify Topology Change : -------
Subring Mode : Virtual Channel

ERPS Control Vlan: c_vlan VID:10
Topology Change Propogation List: None
Topology Change Propogation : Disabled
ERPS Ring's Sub-Ring(s): None
ERPS Ring has following Protected Vlan(s):
Vlan Name VID
p_vlan 20
Number of Protected Vlans: 1
(+) RPL Protection Port, (^) RPL Neighbor Port
(f) Force Switch Port, (m) Manual Switch Port

#SW2: east port to SW3, west port to SW1

Summit-PC-2.1 # show erps "main_ring01-04"

Name: main_ring01-04
Operational State: Idle Node Type: Non-RPL Owner
Configured State : Enabled

East Ring Port : 2 CFM Group: L0203 Status: Unblocked
West Ring Port : 1 CFM Group: L0201 Status: Unblocked

Periodic timer interval: 5000 millisec (Enabled)
Hold-off timer interval: 0 millisec (Enabled)
Guard timer interval : 500 millisec (Enabled)
WTB timer interval : 5500 millisec (Enabled)
WTR timer interval : 10000 millisec (Enabled)

Ring MD Level : ----
Notify Topology Change : -------
Subring Mode : Virtual Channel

ERPS Control Vlan: c_vlan VID:10
Topology Change Propogation List: None
Topology Change Propogation : Disabled
ERPS Ring's Sub-Ring(s): None
ERPS Ring has following Protected Vlan(s):
Vlan Name VID
p_vlan 20
Number of Protected Vlans: 1
(+) RPL Protection Port, (^) RPL Neighbor Port
(f) Force Switch Port, (m) Manual Switch Port

#SW3: east port to SW4, west port to SW2

* Summit-PC-3.2 # show erps "main_ring01-04"

Name: main_ring01-04
Operational State: Pending Node Type: Non-RPL Owner
Configured State : Enabled

East Ring Port : 1 CFM Group: L0304 Status: Blocked
West Ring Port : 2 CFM Group: L0302 Status: Unblocked

Periodic timer interval: 5000 millisec (Enabled)
Hold-off timer interval: 0 millisec (Enabled)
Guard timer interval : 500 millisec (Enabled)
WTB timer interval : 5500 millisec (Enabled)
WTR timer interval : 10000 millisec (Enabled)

Ring MD Level : ----
Notify Topology Change : -------
Subring Mode : Virtual Channel

ERPS Control Vlan: c_vlan VID:10
Topology Change Propogation List: None
Topology Change Propogation : Disabled
ERPS Ring's Sub-Ring(s): None
ERPS Ring has following Protected Vlan(s):
Vlan Name VID
p_vlan 20
Number of Protected Vlans: 1
(+) RPL Protection Port, (^) RPL Neighbor Port
(f) Force Switch Port, (m) Manual Switch Port

#SW4: east port to SW1, west port to SW3

Summit-PC-4.1 # show erps "main_ring01-04"

Name: main_ring01-04
Operational State: Idle Node Type: RPL Neighbor
Configured State : Enabled

East Ring Port : ^1 CFM Group: RPL0401 Status: Blocked
West Ring Port : 2 CFM Group: L0403 Status: Unblocked

Periodic timer interval: 5000 millisec (Enabled)
Hold-off timer interval: 0 millisec (Enabled)
Guard timer interval : 500 millisec (Enabled)
WTB timer interval : 5500 millisec (Enabled)
WTR timer interval : 10000 millisec (Enabled)

Ring MD Level : ----
Notify Topology Change : -------
Subring Mode : Virtual Channel

ERPS Control Vlan: c_vlan VID:10
Topology Change Propogation List: None
Topology Change Propogation : Disabled
ERPS Ring's Sub-Ring(s): None
ERPS Ring has following Protected Vlan(s):
Vlan Name VID
p_vlan 20
Number of Protected Vlans: 1
(+) RPL Protection Port, (^) RPL Neighbor Port
(f) Force Switch Port, (m) Manual Switch Port

Thank you and regards,

Luca.

2 replies

Userlevel 2
here i built a erps/erp ring between 2 summit 450's and a brocade MLX. it worked flawless.. hope this helps you.

ERP: 1, VLAN: 3000

Left interface: Port 5/7
Physical state - UP, ERP Port state - FORWARDING
Transmitted Received Ignored Dropped
RAPS(FS) 0 0 0 0
RAPS(SF) 0 0 0 0
RAPS(MS) 0 0 0 0
RAPS(NR) 36 35 0 0
RAPS(NR, RB) 0 32 0 0
RAPS(EVENT) 0 0 0 0

Right interface: Port 5/9
Physical state - UP, ERP Port state - FORWARDING
Transmitted Received Ignored Dropped
RAPS(FS) 0 0 0 0
RAPS(SF) 0 0 0 0
RAPS(MS) 0 0 0 0
RAPS(NR) 36 35 0 0
RAPS(NR, RB) 0 32 0 0
RAPS(EVENT) 0 0 0 0
SSH@MLX-8-Bude#
SSH@MLX-8-Bude#
SSH@MLX-8-Bude#
SSH@MLX-8-Bude#sh erp config
erp 1
left-interface vlan 3000 ethe 5/7
right-interface vlan 3000 ethe 5/9
raps-default-mac
dot1ag-compliance domain-name erps_6 ma-name erps-ma mep 15
enable
!

SSH@MLX-8-Bude#sh config | b cfm
SSH@MLX-8-Bude#sh run | b cfm
cfm-enable
domain-name erps_6 id 1 level 6
ma-name ERP-MA id 1 vlan-id 3000 priority 6
ccm-interval 1-second
mep 15 down port ethe 5/7
mep 16 down port ethe 5/9

ack1.29 #
* x450-rack1.29 # sh erps-t stat
Ring RAPS RAPS RAPS
Port Sent Received Discarded Blocked Unblocked Failed Recovered
====================================================================================
46 0 66 0 0 0 0 0
45 0 63 0 0 0 0 0
====================================================================================
* x450-rack1.29 # sh config erp det
#
# Module erps configuration.
#
enable erps
configure erps config-warnings on
configure erps multicast add-ring-ports off
configure erps multicast send-query on
configure erps multicast temporary-flooding off
configure erps multicast temporary-flooding duration 15
create erps ERPS-TEST
configure erps ERPS-TEST subring-mode virtualChannel
configure erps ERPS-TEST add control vlan ERPS-Cntrl
configure erps ERPS-TEST ring-port east 46
configure erps ERPS-TEST ring-port west 45
configure erps ERPS-TEST revert enable
configure erps ERPS-TEST timer wait-to-restore 300000
configure erps ERPS-TEST timer periodic 5000
configure erps ERPS-TEST timer hold-off 0
configure erps ERPS-TEST timer guard 500
configure erps ERPS-TEST timer wait-to-block 5500
configure erps ERPS-TEST cfm md-level 6
configure erps ERPS-TEST cfm port east ccm-interval 1000
configure erps ERPS-TEST cfm port east mepid 13 remote-mepid 13
configure erps ERPS-TEST cfm port west ccm-interval 1000
configure erps ERPS-TEST cfm port west mepid 14 remote-mepid 14
enable erps ERPS-TEST
configure erps ERPS-TEST add protected vlan erps-mgmt
* x450-rack1.30 # sh config | b cfm
create cfm domain string "erps_6" md-level 6

#

* x450-rack3.25 # sh erps-T STAT
Ring RAPS RAPS RAPS
Port Sent Received Discarded Blocked Unblocked Failed Recovered
====================================================================================
45 68 65 0 0 0 0 0
46 68 65 0 0 0 0 0
====================================================================================
* x450-rack3.25 #
* x450-rack3.25 #
* x450-rack3.25 # sh config erp det
#
# Module erps configuration.
#
enable erps
configure erps config-warnings on
configure erps multicast add-ring-ports off
configure erps multicast send-query on
configure erps multicast temporary-flooding off
configure erps multicast temporary-flooding duration 15
create erps ERPS-TEST
configure erps ERPS-TEST subring-mode virtualChannel
configure erps ERPS-TEST add control vlan ERPS-Cntrl
configure erps ERPS-TEST ring-port east 45
configure erps ERPS-TEST ring-port west 46
configure erps ERPS-TEST protection-port 45
configure erps ERPS-TEST revert enable
configure erps ERPS-TEST timer wait-to-restore 300000
configure erps ERPS-TEST timer periodic 5000
configure erps ERPS-TEST timer hold-off 0
configure erps ERPS-TEST timer guard 500
configure erps ERPS-TEST timer wait-to-block 5500
configure erps ERPS-TEST cfm md-level 6
configure erps ERPS-TEST cfm port east ccm-interval 1000
configure erps ERPS-TEST cfm port east mepid 11 remote-mepid 11
configure erps ERPS-TEST cfm port west ccm-interval 1000
configure erps ERPS-TEST cfm port west mepid 12 remote-mepid 12
enable erps ERPS-TEST
configure erps ERPS-TEST add protected vlan erps-mgmt
* x450-rack3.26 # sh config | b cfm
create cfm domain string "erps_6" md-level 6
Very useful.

Now, my topology works fine!

Thank you very much.

Regards.

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