I have a single ISIS area with segment routing (no MPLS LDP). All LSR LER nodes running XRv 6.1.2.
On the LER (PE) nodes I have a single L3VPN and I have CE--CE connectivity across this network. When I create a SR-TE tunnel on the 2 PE nodes with destination remote PE and use a static route to direct the traffic I lose CE -- CE connectivity.
Relevant config and debug output below --
interface tunnel-te1
ipv4 unnumbered Loopback0
logging events all
destination 20.20.20.20
path-option 1 explicit name 8-20 segment-routing
path-option 10 dynamic segment-routing
!
router static
address-family ipv4 unicast
20.20.20.20/32 tunnel-te1
!
router isis core
apply-group ISIS_TI-LFA
is-type level-2-only
net 49.0001.0000.0000.0008.00
segment-routing global-block 16000 16500
address-family ipv4 unicast
metric-style wide
metric-style wide level 2
fast-reroute per-prefix tiebreaker node-protecting index 100
mpls traffic-eng level-2-only
mpls traffic-eng router-id Loopback0
segment-routing mpls sr-prefer
segment-routing prefix-sid-map receive
!
interface Loopback0
circuit-type level-2-only
address-family ipv4 unicast
prefix-sid absolute 16008
!
!
interface GigabitEthernet0/0/0/3
circuit-type level-2-only
point-to-point
address-family ipv4 unicast
RP/0/RP0/CPU0:xrv-dev-01#sh mpls tra tu 1 det
Tue Jan 10 17:39:11.882 UTC
Name: tunnel-te1 Destination: 20.20.20.20 Ifhandle:0x8000054
Signalled-Name: xrv-dev-01_t1
Status:
Admin: up Oper: up Path: valid Signalling: connected
path option 10, (Segment-Routing) type dynamic (Basis for Setup, path weight 40)
G-PID: 0x0800 (derived from egress interface properties)
Bandwidth Requested: 0 kbps CT0
Creation Time: Mon Jan 9 20:29:15 2017 (21:09:58 ago)
Config Parameters:
Bandwidth: 0 kbps (CT0) Priority: 7 7 Affinity: 0x0/0xffff
Metric Type: TE (global)
Path Selection:
Tiebreaker: Min-fill (default)
Protection: any (default)
Hop-limit: disabled
Cost-limit: disabled
Path-invalidation timeout: 10000 msec (default), Action: Tear (default)
AutoRoute: disabled LockDown: disabled Policy class: not set
Forward class: 0 (default)
Forwarding-Adjacency: disabled
Autoroute Destinations: 0
Loadshare: 0 equal loadshares
Auto-bw: disabled
Path Protection: Not Enabled
BFD Fast Detection: Disabled
Reoptimization after affinity failure: Enabled
SRLG discovery: Disabled
SNMP Index: 12
Binding SID: 24002
History:
Tunnel has been up for: 00:10:33 (since Tue Jan 10 17:28:40 UTC 2017)
Current LSP:
Uptime: 00:10:33 (since Tue Jan 10 17:28:40 UTC 2017)
Reopt. LSP:
Last Failure:
LSP not signalled, identical to the [CURRENT] LSP
Date/Time: Tue Jan 10 17:29:11 UTC 2017 [00:10:02 ago]
Prior LSP:
ID: 8 Path Option: 1
Removal Trigger: path tear
Current LSP Info:
Instance: 10, Signaling Area: IS-IS core level-2
Uptime: 00:10:33 (since Tue Jan 10 17:28:40 UTC 2017)
Soft Preemption: None
SRLGs: not collected
Path Info:
Segment-Routing Path Info (IS-IS core level-2)
Segment0[Link]: 21.0.0.1 - 21.0.0.2, Label: 24001
Segment1[Link]: 60.0.0.1 - 60.0.0.2, Label: 24003
Segment2[Link]: 70.0.0.2 - 70.0.0.1, Label: 24001
Segment3[Link]: 52.0.0.1 - 52.0.0.2, Label: 24017
Persistent Forwarding Statistics:
Out Bytes: 5684
Out Packets: 64
Displayed 1 (of 1) heads, 0 (of 0) midpoints, 0 (of 0) tails
Displayed 1 up, 0 down, 0 recovering, 0 recovered heads
!
RP/0/RP0/CPU0:xrv-dev-01#sh mpls for labels 24002 det
Tue Jan 10 17:41:29.475 UTC
Local Outgoing Prefix Outgoing Next Hop Bytes
Label Label or ID Interface Switched
------ ----------- ------------------ ------------ --------------- ------------
24002 Pop No ID tt1 point2point 0
Updated: Jan 10 17:28:40.590
Label Stack (Top -> Bottom): { }
MAC/Encaps: 0/0, MTU: 0
Packets Switched: 0
RP/0/RP0/CPU0:xrv-dev-01#sh cef 20.20.20.20/32 det
Tue Jan 10 17:34:35.068 UTC
20.20.20.20/32, version 77, attached, internal 0x1000041 0x0 (ptr 0x1365a4f0) [3], 0x0 (0x135f65e8), 0xa20 (0x14b8e6d8)
Updated Jan 10 17:28:40.592
Prefix Len 32, traffic index 0, precedence n/a, priority 3
gateway array (0x1348c680) reference count 3, flags 0x68, source lsd (5), 1 backups
[3 type 4 flags 0x8401 (0x14bd8978) ext 0x0 (0x0)]
LW-LDI[type=1, refc=1, ptr=0x135f65e8, sh-ldi=0x14bd8978]
gateway array update type-time 1 Jan 10 17:28:40.592
LDI Update time Jan 10 17:28:40.599
LW-LDI-TS Jan 10 17:28:40.599
via tunnel-te1, 7 dependencies, weight 0, class 0 [flags 0x8]
path-idx 0 NHID 0x0 [0x163641e0 0x16363c20]
local adjacency
local label 24009 labels imposed {ImplNull}
Load distribution: 0 (refcount 3)
Hash OK Interface Address
0 Y tunnel-te1 point2point
!
RP/0/RP0/CPU0:xrv-dev-01#sh cef vrf customer-100 172.16.0.170/32 det
Tue Jan 10 17:42:19.297 UTC
172.16.0.170/32, version 24, internal 0x5000001 0x0 (ptr 0x150b59f4) [1], 0x0 (0x0), 0x208 (0x14b8e598)
Updated Jan 10 17:00:12.622
Prefix Len 32, traffic index 0, precedence n/a, priority 3
gateway array (0x1348b7a8) reference count 2, flags 0x4038, source rib (7), 0 backups
[1 type 1 flags 0x40441 (0x14bd3698) ext 0x0 (0x0)]
LW-LDI[type=0, refc=0, ptr=0x0, sh-ldi=0x0]
gateway array update type-time 3 Jan 10 17:28:42.001
LDI Update time Jan 10 17:28:41.994
via 20.20.20.20/32, 3 dependencies, recursive [flags 0x6000]
path-idx 0 NHID 0x0 [0x14c8fd58 0x0]
recursion-via-/32
next hop VRF - 'default', table - 0xe0000000
next hop 20.20.20.20/32 via 24009/0/21
next hop 0.0.0.0/32 tt1 labels imposed {ImplNull 24005}
Load distribution: 0 (refcount 1)
Hash OK Interface Address
0 Y Unknown 24009/0
Thanks for any insight,
Bill
