Table Of Contents
Configuring Microwave 1+1 Hot Standby Protocol on the Cisco ASR 903 Series Router
Understanding Microwave 1+1 Hot Standby Protocol
Overview
Suspending Continuity Check Messages
HSBY Maintenance Associations
Configuring Microwave 1+1 Hot Standby Protocol
ODU Configuration Values
IDU Configuration Values
Configuring HSBY
Configuration Examples
HSBY Sample Configuration
Configuring Microwave 1+1 Hot Standby Protocol on the Cisco ASR 903 Series Router
The following sections describe the Microwave 1+1 Hot Standby (HSBY) Protocol:
•
Understanding Microwave 1+1 Hot Standby Protocol
•Configuring Microwave 1+1 Hot Standby Protocol
•Configuration Examples
Understanding Microwave 1+1 Hot Standby Protocol
•Overview
•HSBY Maintenance Associations
Overview
Microwave 1+1 Hot Standby Protocol (HSBY) is a link protection protocol developed by Nokia Siemens Networks. HSBY extends the functionality of CFM Continuity Check messages to enable detection and handling of hardware failures in microwave devices in order to provide redundancy. HSBY provides link protection support for indoor units (IDUs) and outdoor units (ODUs).
Figure 1 shows a sample physical topology for HSBY using two ODUs (active and standby) and one IDU.
Figure 1 HSBY Link Protection Physical Topology
In this topology, the IDU is connected to an active and a standby ODU. While only the active ODU handles data traffic, both ODUs process CFM and management traffic at all times. The HSBY implementation of CFM detects connectivity failures between the IDU and each ODU and indicates which ODU is active and handling traffic. In the event of a failure, the standby ODU assumes the role of the active ODU.
Suspending Continuity Check Messages
Under some circumstances such as a software upgrade or a device reload, it is necessary to temporarily suspend continuity check messages between the ODU and IDU in order to prevent unnecessary link protection action such as a failover. In this case, the ODU sets a suspend flag within the continuity check messages sent to the IDU indicating the amount of time until continuity check messages resume. The IDU resumes exchanging continuity check messages with the ODU after the suspend interval has passed or after the ODU recovers sends a continuity check message.
Note While the Cisco ASR 903 Series Router processes continuity check suspend messages from the IDU, configuration of continuity check messages on the Cisco ASR 903 Series Router is not supported.
HSBY Maintenance Associations
HSBY protocol uses two types of CFM continuity check messages:
•E-CCM—An IDU-to-ODU continuity check message that functions at Ethernet CFM domain level 0. There are two active E-CCM sessions when HSBY is configured.
•P-CCM—An ODU-to-ODU continuity check message that functions at Ethernet CFM domain level 4.
Note The IDU is only associated with the E-CCM sessions; it has outward-facing MEPs configured for each session.
Thus, the HSBY configuration shown in Figure 1 consists of five separate traffic flows:
•CFM traffic between the IDU and ODU 1
•CFM traffic between the IDU and the ODU 2
•CFM traffic between ODU 1 and ODU 2. This traffic passes through IDU.
•Data traffic between the WAN and ODU 1. This traffic passes through the IDU.
Figure 2 provides a logical view of the maintenance associations used in this HSBY topology.
Figure 2 HSBY Protocol CFM Maintenance Associations
Note To prevent switching loops on the management VLAN, we recommend that you enable RSTP on the management VLAN. For more information about how to configure RSTP, see "Understanding RSTP" section.
Configuring Microwave 1+1 Hot Standby Protocol
The following sections describe how to configure Microwave 1+1 Hot Standby Protocol (HSBY) on the Cisco ASR 903 Series Router.
•ODU Configuration Values
•IDU Configuration Values
•Configuring HSBY
ODU Configuration Values
HSBY protocol specifies that some values on the ODU are configurable while others utilize fixed values. Table 1 summarizes the permitted values for an ODU using HSBY protocol.
Table 1 HSBY ODU Configuration Parameters Summary
Parameter
|
Default Value
|
Permitted Values
|
Short MA Name
|
Learned
|
0-65535
|
MPID
|
2
|
Fixed
|
MA VLAN-ID (P-CCM)
|
None
|
16-50
|
IDU Configuration Values
HSBY protocol specifies that some values on the IDU are configurable while others utilize fixed values. Table 2 summarizes the permitted values for an IDU using HSBY protocol.
Table 2 HSBY IDU Configuration Parameters Summary
Parameter
|
Default Value
|
Permitted Values
|
CC Interval
|
100 ms
|
10 ms, 100 ms, and 1000 ms
|
Domain Level
|
0
|
Fixed
|
Domain Name
|
Null
|
Fixed
|
MA VLAN-ID (E-CCM)
|
None
|
1-15
|
MPID
|
1
|
Fixed
|
Short MA Name
|
None
|
0-65535
|
Suspend Interval
|
160 seconds
|
80 s, 160 s, 240 s, and 320 s
|
Configuring HSBY
Follow these steps to configure HSBY protocol on the Cisco ASR 903 Series Router.
Summary Steps
1. enable
2. configure terminal
3. ethernet cfm global
4. link-protection enable
5. link-protection group management vlan vlan-id
6. link-protection suspend-interval interval interval
7. link-protection group group-number pccm vlan vlan-id
8. ethernet cfm domain domain-name level level-id [direction outward]
9. id {mac-address domain-number | dns dns-name | null}
10. service {ma-name | ma-num | vlan-id vlan-id | vpn-id vpn-id} [port | vlan vlan-id [direction down]]
11. mep mpid mpid
12. mep mpid mpid
13. continuity-check [interval time | loss-threshold threshold | static rmep]
14. exit
15. exit
16. ethernet cfm domain domain-name level level-id [direction outward]
17. id {mac-address domain-number | dns dns-name | null}
18. service {ma-name | ma-num | vlan-id vlan-id | vpn-id vpn-id} [port | vlan vlan-id [direction down]]
19. mep mpid mpid
20. mep mpid mpid
21. continuity-check [interval time | loss-threshold threshold | static rmep]
22. exit
23. exit
24. interface type slot / port
25. spanning-tree portfast {disable | trunk}
26. service instance id ethernet evc-name
27. encapsulation dot1q vlan-id second-dot1q {any | vlan-id}
28. bridge-domain bridge-id [split-horizon [group group-id]]
29. ethernet cfm mep domain domain-name mpid mpid {port | vlan vlan-id}
30. link-protection group group-number
31. exit
32. interface type slot / port
33. spanning-tree portfast {disable | trunk}
34. service instance id ethernet evc-name
35. encapsulation dot1q vlan-id second-dot1q {any | vlan-id}
36. bridge-domain bridge-id [split-horizon [group group-id]]
37. ethernet cfm mep domain domain-name mpid mpid {port | vlan vlan-id}
38. link-protection group group-number
39. exit
40. show ethernet cfm maintenance-points remote detail
| |
Command
|
Purpose
|
Step 1
|
enable
Example:
Router> enable
|
Enables privileged EXEC mode.
Enter your password if prompted.
|
Step 2
|
configure terminal
Example:
Router# configure terminal
|
Enters global configuration mode.
|
Step 3
|
ethernet cfm global
Example:
Router(config)# ethernet cfm global
|
Enables Ethernet CFM globally.
|
Step 4
|
link-protection enable
Example:
Router(config)# link-protection enable
|
Enables link protection globally on the router.
|
Step 5
|
link-protection group management vlan vlan-id
Example:
Router(config)# link-protection group management vlan 51
|
Defines the management VLAN used for link protection.
|
Step 6
|
link-protection suspend-interval interval interval
Example:
Router(config)# link-protection suspend-interval 320
|
Sets a link protection suspend interval.
|
Step 7
|
link-protection group group-number pccm vlan vlan-id
Example:
Router(config)# link-protection group 2 pccm vlan 16
|
Specifies an ODU-to-ODU continuity check message (P-CCM) VLAN.
|
Step 8
|
ethernet cfm domain domain-name level level-id [direction outward]
Example:
Router(config)# ethernet cfm domain eccm1 level 0
|
Configures the CFM domain for ODU 1 and enters Ethernet CFM configuration mode.
|
Step 9
|
id {mac-address domain-number | dns dns-name | null}
Example:
Router(config-ecfm)# id null
|
Configures a maintenance domain identifier (MDID).
|
Step 10
|
service {ma-name | ma-num | vlan-id vlan-id | vpn-id vpn-id} [port | vlan vlan-id [direction down]]
Example:
Router(config-ecfm)# service 1 vlan 14 direction down
|
Defines a maintenance association for ODU 1 and enters Ethernet CFM service instance configuration mode.
|
Step 11
|
mep mpid mpid
Example:
Router(config-ecfm-srv)# mep mpid 1
|
Defines the local MEP ID.
|
Step 12
|
mep mpid mpid
Example:
Router(config-ecfm-srv)# mep mpid 2
|
Defines the remote MEP ID.
|
Step 13
|
continuity-check [interval time | loss-threshold threshold | static rmep]
Example:
Router(config-ecfm-srv)# continuity-check interval 100ms
|
Enables transmission of continuity check messages (CCMs) within the ODU 1 maintenance association and defines a continuity-check interval.
|
Step 14
|
exit
Example:
Router(config-ecfm-srv)# exit
|
Exits Ethernet CFM service instance configuration mode.
|
Step 15
|
exit
Example:
Router(config-ecfm)# exit
|
Exits Ethernet CFM configuration mode.
|
Step 16
|
ethernet cfm domain domain-name level level-id [direction outward]
Example:
Router(config)# ethernet cfm domain eccm2 level 0
|
Configures the CFM domain for ODU 2 and enters CFM configuration mode.
|
Step 17
|
id {mac-address domain-number | dns dns-name | null}
Example:
Router(config-ecfm)# id null
|
Configures a maintenance domain identifier (MDID).
|
Step 18
|
service {ma-name | ma-num | vlan-id vlan-id | vpn-id vpn-id} [port | vlan vlan-id [direction down]]
Example:
Router(config-ecfm)# service 2 vlan 15 direction down
|
Defines a maintenance association for ODU 2 and enters Ethernet CFM service configuration mode.
|
Step 19
|
mep mpid mpid
Example:
Router(config-ecfm-srv)# mep mpid 1
|
Defines the local MEP ID.
|
Step 20
|
mep mpid mpid
Example:
Router(config-ecfm-srv)# mep mpid 2
|
Defines the remote MEP ID.
|
Step 21
|
continuity-check [interval time | loss-threshold threshold | static rmep]
Example:
Router(config-ecfm-srv)# continuity-check interval 100ms
|
Enables transmission of CCMs within the ODU 2 maintenance association and defines a continuity-check interval.
|
Step 22
|
exit
Example:
Router(config-ecfm-srv)# exit
|
Exits Ethernet CFM service instance configuration mode.
|
Step 23
|
exit
Example:
Router(config-ecfm)# exit
|
Exits Ethernet CFM configuration mode.
|
Step 24
|
interface type slot / port
Example:
Router(config)# interface gigabitethernet 1/1
|
Configures the interface to be connected to ODU 1 and enters interface configuration mode.
|
Step 25
|
spanning-tree portfast {disable | trunk}
Example:
Router(config-if)# spanning-tree portfast trunk
|
Enables PortFast on the interface when it is in trunk mode.
|
Step 26
|
service instance id ethernet evc-name
Example:
Router(config-if)# service instance 1 ethernet EVCODU1
|
Configures an Ethernet service instance on an interface and to enter Ethernet service configuration mode.
|
Step 27
|
encapsulation dot1q vlan-id second-dot1q {any | vlan-id}
Example:
Router(config-if)# encapsulation dot1q 10
|
Enables IEEE 802.1Q encapsulation of traffic on the EVC interface.
|
Step 28
|
bridge-domain bridge-id [split-horizon [group group-id]]
Example:
Router(config-if)# bridge-domain 10
|
Binds the service instance to a bridge domain instance.
|
Step 29
|
ethernet cfm mep domain domain-name mpid mpid {port | vlan vlan-id}
Example:
Router(config-if)# ethernet cfm mep domain eccm1 mpid 1 vlan 14
|
Configures a CFM MEP domain for ODU 1.
|
Step 30
|
link-protection group group-number
Example:
Router(config-if)# link-protection group 1
|
Configures a link-protection group for ODU 2.
|
Step 31
|
exit
Example:
Router(config-if)# exit
|
Exits interface configuration mode.
|
Step 32
|
interface type slot / port
Example:
Router(config)# interface GigabitEthernet 3/2
|
Configures the interface to be connected to ODU 2 and enters interface configuration mode.
|
Step 33
|
spanning-tree portfast {disable | trunk}
Example:
Router(config-if)# spanning-tree portfast trunk
|
Enables PortFast on the interface when it is in trunk mode.
|
Step 34
|
service instance id ethernet evc-name
Example:
Router(config-if)# service instance 2 ethernet EVCODU2
|
Configures an Ethernet service instance on an interface and to enter Ethernet service configuration mode.
|
Step 35
|
encapsulation dot1q vlan-id second-dot1q {any | vlan-id}
Example:
Router(config-if)# encapsulation dot1q 10
|
Enables IEEE 802.1Q encapsulation of traffic on the EVC interface.
|
Step 36
|
bridge-domain bridge-id [split-horizon [group group-id]]
Example:
Router(config-if)# bridge-domain 10
|
Binds the service instance to a bridge domain instance.
|
Step 37
|
ethernet cfm mep domain domain-name mpid mpid {port | vlan vlan-id}
Example:
Router(config-if)# ethernet cfm mep domain ECCM2 mpid 100 vlan 11
|
Configures a CFM MEP domain for ODU 2.
|
Step 38
|
link-protection group group-number
Example:
Router(config-if)# link-protection group 1
|
Configures a link-protection group for ODU 2.
|
Step 39
|
exit
Example:
Router(config-if)# exit
|
Returns the CLI to privileged EXEC mode.
|
Step 40
|
show ethernet cfm maintenance-points remote detail
Example:
Router# show ethernet cfm maintenance-points remote detail
|
(Optional) Displays remote maintenance endpoints in the continuity check database.
|
Configuration Examples
This section contains configuration examples for HSBY protocol.
HSBY Sample Configuration
The following configuration example shows how to configure HSBY. This example uses EVC interfaces, which are the only supported interfaces for HSBY on the Cisco ASR 903 Series Router.
link-protection suspend-interval 320
link-protection management-vlan 500
ethernet cfm domain ECCM1 level 0
service number 1 evc EVCODU1 vlan 10 direction down
continuity-check interval 10ms
ethernet cfm domain ECCM2 level 0
service number 1 evc EVCODU2 vlan 11 direction down
continuity-check interval 10ms
interface GigabitEthernet0/0/1
spanning-tree portfast trunk
service instance 1 ethernet EVCODU1
description ODU1-ECCM-EVC
ethernet cfm mep domain ECCM1 mpid 100 vlan 10
service instance 2 ethernet
description ODU1-Management-Vlan
service instance trunk 3 ethernet
description ODU1-Data-Vlan
encapsulation dot1q 100-200
bridge-domain from-encapsulation
interface GigabitEthernet0/0/2
spanning-tree portfast trunk
service instance 2 ethernet EVCODU2
description ODU2-ECCM-EVC
ethernet cfm mep domain ECCM2 mpid 100 vlan 11
service instance 2 ethernet
description ODU1-Management-Vlan
service instance trunk 3 ethernet
description ODU1-Data-Vlan
encapsulation dot1q 100-200
rewrite ingress tag pop 1 symmetric
bridge-domain from-encapsulation
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