Validation
OSPF Neighborship
PE1
#show ip ospf neighbor
Total number of full neighbors: 2
OSPF process 1 VRF(default):
Neighbor ID Pri State Dead Time Address Interface Instance ID
2.2.2.2 1 Full/Backup 00:00:38 10.1.2.21 xe1 0
4.4.4.4 1 Full/DR 00:00:33 10.1.4.41 xe5 0
P1
#show ip ospf neighbor
Total number of full neighbors: 2
OSPF process 1 VRF(default):
Neighbor ID Pri State Dead Time Address Interface Instance ID
1.1.1.1 1 Full/DR 00:00:35 10.1.2.12 xe1 0
3.3.3.3 1 Full/Backup 00:00:34 10.2.3.32 xe10 0
P2
#show ip ospf neighbor
Total number of full neighbors: 2
OSPF process 1 VRF(default):
Neighbor ID Pri State Dead Time Address Interface Instance ID
2.2.2.2 1 Full/DR 00:00:37 10.2.3.23 xe10 0
4.4.4.4 1 Full/Backup 00:00:39 10.3.4.43 xe5 0
PE2
#show ip ospf neighbor
Total number of full neighbors: 2
OSPF process 1 VRF(default):
Neighbor ID Pri State Dead Time Address Interface Instance ID
1.1.1.1 1 Full/Backup 00:00:38 10.1.4.14 xe2 0
3.3.3.3 1 Full/DR 00:00:36 10.3.4.34 xe5 0
RSVP Session
PE1
#show rsvp session
Type : PRI - Primary, SEC - Secondary, DTR - Detour, BPS - Bypass
State : UP - Up, DN - Down, BU - Backup in Use, SU - Secondary in Use, FS - Forced to Secondary
* indicates the session is active with local repair at one or more nodes
Ingress RSVP:
To From Type LSPName State Uptime Rt Style Labelin Labelout DSType
3.3.3.3 1.1.1.1 PRI R1-R3-Primary UP 00:54:48 1 1 SE - 24321 DEFAULT
3.3.3.3 1.1.1.1 BPS B1-B4-Bypass UP 01:08:32 1 1 SE - 24321 DEFAULT
Total 2 displayed, Up 2, Down 0.
#show rsvp bypass
Ingress RSVP:
To From LSPName State Uptime Rt Style Labelin Labelout DSType
3.3.3.3 1.1.1.1 B1-B4-Bypass UP 01:09:17 1 1 SE - 24321 DEFAULT
#show rsvp bypass protected-lsp-list
Bypass trunk: B1-B4
Bypass trunk bandwidth type: best-effort
List of LSP's Protected:
Tunnel-id Lsp Id Lsp Name Role Ext_tnl_id Ingress Egress
5001 2202 R1-R3-Primary Ingress 1.1.1.1 1.1.1.1 3.3.3.3
Total LSP protected : 1
Bandwidth in use : 0
#show rsvp bypass B1-B4 protected-lsp-list
Bypass trunk: B1-B4
Bypass trunk bandwidth type: best-effort
List of LSP's Protected:
Tunnel-id Lsp Id Lsp Name Role Ext_tnl_id Ingress Egress
5001 2202 R1-R3-Primary Ingress 1.1.1.1 1.1.1.1 3.3.3.3
Total LSP protected : 1
Bandwidth in use : 0
#show rsvp session detail
Ingress (Primary)
3.3.3.3
From: 1.1.1.1, LSPstate: Up, LSPname: R1-R3-Primary
Ingress FSM state: Operational
Establishment Time: 0s 8ms
Setup priority: 7, Hold priority: 0
CSPF usage: Enabled, CSPF Retry Count: 0, CSPF Retry Interval: 30 seconds
IGP-Shortcut: Disabled, LSP metric: 2
LSP Protection: facility
Fast-Reroute bandwidth : 0
Protection type desired: Link
Fast-Reroute Setup priority: 7, Hold priority: 0
Bypass trunk: B1-B4, Merge Point: 10.2.3.32, MP Label: 3
Bypass OutLabel: 24321, OutIntf: xe5
Protection provided -> Type: Link, BW: Best-effort
Label in: -, Label out: 24321
Tspec rate: 0, Fspec rate: 0
Policer: Not Configured
Tunnel Id: 5001, LSP Id: 2202, Ext-Tunnel Id: 1.1.1.1
Downstream: 10.1.2.21, xe1
Path refresh: 30 seconds (RR enabled) (due in 26564 seconds)
Resv refresh: 0 seconds (due in 0 seconds)
Resv lifetime: 157 seconds (due in 150 seconds)
Retry count: 0, intrvl: 30 seconds
RRO re-use as ERO: Disabled
Label Recording: Enabled
Admin Groups: none
Configured Path: primary_1 (in use)
Configured Explicit Route Detail :
10.1.2.21/32 strict
10.2.3.32/32 strict
Session Explicit Route Detail :
10.1.2.21/32 strict
10.2.3.32/32 strict
Record route:
LP = 1 -> PLR's Downstream link is protected PU = 1 -> Protection is in use on PLR
NP = 1 -> PLR's Downstream neighbor is protected BP = 1 -> BW protection available at PLR
-------------------------------------------------------------
IP Address Label (LP, PU, NP, BP)
-------------------------------------------------------------
<self>
10.1.2.21 24321 ( 0, 0, 0, 0)
10.2.3.32 3 ( 0, 0, 0, 0)
Style: Shared Explicit Filter
Traffic type: controlled-load
Minimum Path MTU: 1500
Last Recorded Error Code: None
Last Recorded Error Value: None
Node where Last Recorded Error originated: None
Trunk Type: mpls
Ingress (Bypass)
3.3.3.3
From: 1.1.1.1, LSPstate: Up, LSPname: B1-B4-Bypass
Ingress FSM state: Operational
Establishment Time: 0s 14ms
Setup priority: 7, Hold priority: 0
CSPF usage: Enabled, CSPF Retry Count: 0, CSPF Retry Interval: 30 seconds
IGP-Shortcut: Disabled, LSP metric: 2
LSP Protection: None
Bypass trunk bandwidth type: Best-effort
Label in: -, Label out: 24321
Tspec rate: 0, Fspec rate: 0
Policer: Not Configured
Tunnel Id: 5002, LSP Id: 2203, Ext-Tunnel Id: 1.1.1.1
Downstream: 10.1.4.41, xe5
Path refresh: 30 seconds (RR enabled) (due in 25747 seconds)
Resv lifetime: 157 seconds (due in 139 seconds)
Retry count: 0, intrvl: 30 seconds
RRO re-use as ERO: Disabled
Label Recording: Disabled
Admin Groups: none
Configured Path: bypass_1 (in use)
Configured Explicit Route Detail :
10.1.4.41/32 strict
10.3.4.34/32 strict
Session Explicit Route Detail :
10.1.4.41/32 strict
10.3.4.34/32 strict
Record route:
-------------------------------------------------------------
IP Address Label
-------------------------------------------------------------
<self>
10.1.4.41
10.3.4.34
Style: Shared Explicit Filter
Traffic type: controlled-load
Minimum Path MTU: 1500
Last Recorded Error Code: None
Last Recorded Error Value: None
Node where Last Recorded Error originated: None
Trunk Type: mpls
Total LSP protected : 1, Bandwidth in use : 0
P1
#show rsvp session
Type : PRI - Primary, SEC - Secondary, DTR - Detour, BPS - Bypass
State : UP - Up, DN - Down, BU - Backup in Use, SU - Secondary in Use, FS - Forced to Secondary
* indicates the session is active with local repair at one or more nodes
Transit RSVP:
To From Type LSPName State Uptime Rt Style Labelin Labelout DSType
3.3.3.3 1.1.1.1 PRI R1-R3-Primary UP 00:57:44 1 1 SE 24321 3 ELSP_CON
Total 1 displayed, Up 1, Down 0.
#show rsvp session de
Transit
3.3.3.3
From: 1.1.1.1, LSPstate: Up, LSPname: R1-R3-Primary
Transit upstream state: Operational, downstream state: Operational
Setup priority: 7, Hold priority: 0
IGP-Shortcut: Disabled, LSP metric: 65
LSP Protection: facility
Fast-Reroute bandwidth : 0
Protection type desired: Link
Fast-Reroute Setup priority: 7, Hold priority: 0
Label in: 24321, Label out: 3
Tspec rate: 0, Fspec rate: 0
Tunnel Id: 5001, LSP Id: 2202, Ext-Tunnel Id: 1.1.1.1
Downstream: 10.2.3.32, xe10 Upstream: 10.1.2.12, xe1
Path refresh: 30 seconds (RR enabled) (due in 26500 seconds)
Path lifetime: 157 seconds (due in 126 seconds)
Resv refresh: 30 seconds (RR enabled) (due in 20926 seconds)
Resv lifetime: 157 seconds (due in 151 seconds)
RRO re-use as ERO: Disabled
Label Recording: Enabled
Admin Groups: Received Explicit Route Detail :
10.1.2.21/32 strict
10.2.3.32/32 strict
Session Explicit Route Detail :
10.2.3.32/32 strict
Record route:
-------------------------------------------------------------
IP Address Label
-------------------------------------------------------------
10.1.2.12 24321
<self>
10.2.3.32 3
Style: Shared Explicit Filter
Traffic type: controlled-load
Minimum Path MTU: 1500
LSP Type: ELSP_CONFIG
CLASS DSCP_value EXP_value
Last Recorded Error Code: None
Last Recorded Error Value: None
Node where Last Recorded Error originated: None
Trunk Type: mpls
P2
#show rsvp session
Type : PRI - Primary, SEC - Secondary, DTR - Detour, BPS - Bypass
State : UP - Up, DN - Down, BU - Backup in Use, SU - Secondary in Use, FS - Forced to Secondary
* indicates the session is active with local repair at one or more nodes
Egress RSVP:
To From Type LSPName State Uptime Rt Style Labelin Labelout DSType
3.3.3.3 1.1.1.1 PRI R1-R3-Primary UP 00:58:47 1 1 SE 3 - ELSP_CON
3.3.3.3 1.1.1.1 PRI B1-B4-Bypass UP 01:12:30 1 1 SE 3 - ELSP_CON
Total 2 displayed, Up 2, Down 0
#show rsvp session detail
Egress
3.3.3.3
From: 1.1.1.1, LSPstate: Up, LSPname: R1-R3-Primary
Egress FSM state: Operational
Setup priority: 7, Hold priority: 0
IGP-Shortcut: Disabled, LSP metric: 65
LSP Protection: facility
Fast-Reroute bandwidth : 0
Protection type desired: Link
Fast-Reroute Setup priority: 7, Hold priority: 0
Label in: 3, Label out: -
Tspec rate: 0, Fspec rate: 0
Tunnel Id: 5001, LSP Id: 2202, Ext-Tunnel Id: 1.1.1.1
Upstream: 10.2.3.23, xe10
Path lifetime: 157 seconds (due in 140 seconds)
Resv refresh: 30 seconds (RR enabled) (due in 37780 seconds)
RRO re-use as ERO: Disabled
Label Recording: Enabled
Admin Groups: Received Explicit Route Detail :
10.2.3.32/32 strict
Record route:
-------------------------------------------------------------
IP Address Label
-------------------------------------------------------------
10.1.2.12 24321
10.2.3.23 3
<self>
Style: Shared Explicit Filter
Traffic type: controlled-load
Minimum Path MTU: 1500
LSP Type: ELSP_CONFIG
CLASS DSCP_value EXP_value
Last Recorded Error Code: None
Last Recorded Error Value: None
Node where Last Recorded Error originated: None
Trunk Type: mpls
Egress
3.3.3.3
From: 1.1.1.1, LSPstate: Up, LSPname: B1-B4-Bypass
Egress FSM state: Operational
Setup priority: 7, Hold priority: 0
IGP-Shortcut: Disabled, LSP metric: 65
LSP Protection: None
Label in: 3, Label out: -
Tspec rate: 0, Fspec rate: 0
Tunnel Id: 5002, LSP Id: 2203, Ext-Tunnel Id: 1.1.1.1
Upstream: 10.3.4.43, xe5
Path lifetime: 157 seconds (due in 134 seconds)
Resv refresh: 30 seconds (RR enabled) (due in 29222 seconds)
RRO re-use as ERO: Disabled
Label Recording: Disabled
Admin Groups: Received Explicit Route Detail :
10.3.4.34/32 strict
Record route:
-------------------------------------------------------------
IP Address Label
-------------------------------------------------------------
10.1.4.14
10.3.4.43
<self>
Style: Shared Explicit Filter
Traffic type: controlled-load
Minimum Path MTU: 1500
LSP Type: ELSP_CONFIG
CLASS DSCP_value EXP_value
Last Recorded Error Code: None
Last Recorded Error Value: None
Node where Last Recorded Error originated: None
Trunk Type: mpls.
PE2
#show rsvp session
Type : PRI - Primary, SEC - Secondary, DTR - Detour, BPS - Bypass
State : UP - Up, DN - Down, BU - Backup in Use, SU - Secondary in Use, FS - Forced to Secondary
* indicates the session is active with local repair at one or more nodes
Transit RSVP:
To From Type LSPName State Uptime Rt Style Labelin Labelout DSType
3.3.3.3 1.1.1.1 PRI B1-B4-Bypass UP 01:14:12 1 1 SE 24321 3 ELSP_CON
Total 1 displayed, Up 1, Down 0.
#show rsvp session de
Transit
3.3.3.3
From: 1.1.1.1, LSPstate: Up, LSPname: B1-B4-Bypass
Transit upstream state: Operational, downstream state: Operational
Setup priority: 7, Hold priority: 0
IGP-Shortcut: Disabled, LSP metric: 65
LSP Protection: None
Label in: 24321, Label out: 3
Tspec rate: 0, Fspec rate: 0
Tunnel Id: 5002, LSP Id: 2203, Ext-Tunnel Id: 1.1.1.1
Downstream: 10.3.4.34, xe5 Upstream: 10.1.4.14, xe2
Path refresh: 30 seconds (RR enabled) (due in 25543 seconds)
Path lifetime: 157 seconds (due in 146 seconds)
Resv refresh: 30 seconds (RR enabled) (due in 17729 seconds)
Resv lifetime: 157 seconds (due in 135 seconds)
RRO re-use as ERO: Disabled
Label Recording: Disabled
Admin Groups: Received Explicit Route Detail :
10.1.4.41/32 strict
10.3.4.34/32 strict
Session Explicit Route Detail :
10.3.4.34/32 strict
Record route:
-------------------------------------------------------------
IP Address Label
-------------------------------------------------------------
10.1.4.14
<self>
10.3.4.34
Style: Shared Explicit Filter
Traffic type: controlled-load
Minimum Path MTU: 1500
LSP Type: ELSP_CONFIG
CLASS DSCP_value EXP_value
Last Recorded Error Code: None
Last Recorded Error Value: None
Node where Last Recorded Error originated: None
Trunk Type: mpls
Limitations
Dedicated Bypass Bandwidth
Refer the topology defined above.
Suppose we have two primary tunnels P1 (100mbps) and P2(20mbps) ingressing from R1 and egressing at R3 (path R1->R2>R3) and asking for BW protection and we have two Bypass tunnels bp1 (120mbps) and bp2( 80mbps) type dedicated with same ingress and egress router taking Path R1->R4->R3. Below are the two cases defined in which we can observe different kinds of behavior.
1. Let the primary P1 and P2 come up.
CASE 1:
i) If the bypass bp1 (120mbps) comes up first it will give protection to both the primaries P1 and P2. bp2 should remain idle and will not give protection if there are no other primary tunnels asking for it.
CASE 2:
i) If the bypass bp2 (80mbps) comes up first it will give protection to only the primary P2 (20mbps) that will have satisfied protection which will not be changed until the bypass will go down.
ii) After that if bp1 (120mbps) comes it will provide protection to primary P1 (100mbps).
So in the CASE 1 after the protection has been provided to both the primary tunnels P1 and P2 by bypass bp1 if new primary tunnel P3 comes up with BW protection of 80mbps it would be given by bp2 (80mbps).
But in the CASE 2 as bp2 has only 60mbps left (20mbps is being used by P2) and it would not give protection to P3 tunnel and it will remain unprotected. To get the protection new tunnel has to have setup and hold priorities higher than other tunnels which are already been served with the bypass protection.
Secondary Tunnel
Suppose we have primary tunnel P1 (100mbps) ingressing from R1 and egressing at R3 (path R1->R2>R3) and asking for BW protection and we have Bypass tunnel bp1 (120mbps) type dedicated with same ingress and egress router taking Path R1->R4->R3. Then Bypass will start providing protection to primary P1.
If the primary went down it will start using the local protection.
After that if the secondary tunnel is provisioned, primary LSP, which is in using backup state shall continue to use backup path and will not shift over to secondary path.