RP/0/RP0/CPU0:R1#show version Thu Sep 10 11:53:27.350 UTC Cisco IOS XR Software, Version 26.1.1 LNT Copyright (c) 2013-2026 by Cisco Systems, Inc. Build Information: Built By : cisco Built On : Thu Feb 26 03:41:18 UTC 2026 Build Host : iox-lnx-054 Workspace : /auto/srcarchive12/prod/26.1.1/xrd-control-plane/ws/ Version : 26.1.1 Label : 26.1.1 cisco XRd Control Plane cisco XRd-CP-C-01 processor with 248GB of memory R1 uptime is 1 hour, 4 minutes XRd Control Plane Container RP/0/RP0/CPU0:R1#show interface description Thu Sep 10 11:53:27.498 UTC Interface Status Protocol Description -------------------------------------------------------------------------------- Lo0 up up Lo1 up up Lo2 up up Nu0 up up Mg0/RP0/CPU0/0 up up management Gi0/0/0/0 up up to R2 (10.1.2.0/24 p2p) Gi0/0/0/1 admin-down admin-down Gi0/0/0/2 admin-down admin-down RP/0/RP0/CPU0:R1#show route Thu Sep 10 11:53:27.962 UTC Codes: C - connected, S - static, R - RIP, B - BGP, (>) - Diversion path D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP i - ISIS, L1 - IS-IS level-1, L2 - IS-IS level-2 ia - IS-IS inter area, su - IS-IS summary null, * - candidate default U - per-user static route, o - ODR, L - local, G - DAGR, l - LISP A - access/subscriber, a - Application route M - mobile route, r - RPL, t - Traffic Engineering, (!) - FRR Backup path s - local SRv6 route, z - local IID route Gateway of last resort is not set L 1.1.1.1/32 is directly connected, 01:02:37, Loopback0 i L2 2.2.2.2/32 [115/10] via 10.1.2.2, 00:05:44, GigabitEthernet0/0/0/0 i L2 3.3.3.3/32 [115/20] via 10.1.2.2, 00:05:44, GigabitEthernet0/0/0/0 i L2 4.4.4.4/32 [115/20] via 10.1.2.2, 00:05:44, GigabitEthernet0/0/0/0 C 10.1.2.0/24 is directly connected, 00:05:46, GigabitEthernet0/0/0/0 L 10.1.2.1/32 is directly connected, 00:05:46, GigabitEthernet0/0/0/0 i L2 10.2.0.0/24 [115/20] via 10.1.2.2, 00:05:44, GigabitEthernet0/0/0/0 L 172.16.1.1/32 is directly connected, 00:15:39, Loopback1 L 172.16.2.1/32 is directly connected, 00:06:48, Loopback2 RP/0/RP0/CPU0:R1#show route isis Thu Sep 10 11:53:28.345 UTC i L2 2.2.2.2/32 [115/10] via 10.1.2.2, 00:05:45, GigabitEthernet0/0/0/0 i L2 3.3.3.3/32 [115/20] via 10.1.2.2, 00:05:45, GigabitEthernet0/0/0/0 i L2 4.4.4.4/32 [115/20] via 10.1.2.2, 00:05:45, GigabitEthernet0/0/0/0 i L2 10.2.0.0/24 [115/20] via 10.1.2.2, 00:05:45, GigabitEthernet0/0/0/0 RP/0/RP0/CPU0:R1#show isis Thu Sep 10 11:53:28.638 UTC IS-IS Router: 1 System Id: 0010.0100.1001 Hostname: R1 IS Levels: level-2-only Manual area address(es): 49.0001 Routing for area address(es): 49.0001 Multi-Instance Id: 0 Running on: RP/0/RP0/CPU0 Job Id: 1003 PID: 4192 Respawn count: 1 Started: Thu 2026 Sep 10 10:50:40.446 UTC Null0 ready: Thu 2026 Sep 10 10:50:41.932 UTC Protocol shutdown: No System memory state: Normal Last change: never Memory state: Normal Last change: never Last/Initial memory usage/limit: 1597033/2147483648 0% Memory state monitoring interval: 60 s Memory usage/limit: 13865724/2147483648 0% Memory usage specifics (count/bytes): Nodes: 5/2040 LSPs: 5/2090 Links: 8/9792 Prefixes: 11/3784 Nets: 8/4352 Paths: 10/960 LSP MTU: 1492 LSP Full: level-1: No, level-2: No LSP fast flooding: Disabled Max LSP Tx: 1000 PSNP Delay: 500 ms PSNP interval: 50 ms Non-stop forwarding: Disabled Most recent startup mode: Cold Restart MFI LSD registered: No MFI LSD last registered: never TE connection status: Down TE connection up: never TE connection flaps: 0 XTC connection status: Down XTC connection up: never XTC connection flaps: 0 BFD connection status: Up BFD connection up: Thu 2026 Sep 10 10:50:42.846 UTC BFD connection flaps: 0 BFD HA role change: never BFD client HA role: none BFD server HA role: none Overload Bit: not configured Maximum Metric: not configured Topologies supported by IS-IS: IPv4 Unicast Rib connected Level-2 Metric style (generate/accept): Narrow/Narrow Metric: 10 No protocols redistributed Distance: 115 Advertise Passive Interface Prefixes Only: No Interfaces supported by IS-IS 1: Loopback0 is running passively (passive in configuration) Loopback1 is running passively (passive in configuration) Loopback2 is running passively (passive in configuration) GigabitEthernet0/0/0/0 is running actively (active in configuration) RP/0/RP0/CPU0:R1#show isis hostname Thu Sep 10 11:53:28.788 UTC IS-IS 1 hostnames Level System ID Dynamic Hostname 2 * 0010.0100.1001 R1 2 0020.0200.2002 R2 2 0030.0300.3003 R3 2 0040.0400.4004 R4 RP/0/RP0/CPU0:R1#show isis interface Thu Sep 10 11:53:28.914 UTC IS-IS 1 Interfaces Loopback0 Enabled Adjacency Formation: Disabled (Passive in IS-IS cfg) Prefix Advertisement: Enabled Bandwidth: 0 Circuit Type: level-2-only (Configured: level-1-2) Media Type: Loop Circuit Number: 0 IPv4 Unicast Topology: Enabled Adjacency Formation: Disabled (Intf passive in IS-IS cfg) Prefix Advertisement: Running Policy (L1/L2): -/- Metric (L1/L2): 0/0 Metric fallback: Bandwidth (L1/L2): Inactive/Inactive Anomaly (L1/L2): Inactive/Inactive Weight (L1/L2): 0/0 MPLS Max Label Stack: 0/0/0/0 (PRI/BKP/SRTE/SRAT) MPLS LDP Sync (L1/L2): Disabled/Disabled IPv4 Address Family: Enabled Protocol State: Up Forwarding Address: None (Intf passive in IS-IS cfg) Global Prefix: 1.1.1.1/32 PME Link Delays and Loss: - Loopback1 Enabled Adjacency Formation: Disabled (Passive in IS-IS cfg) Prefix Advertisement: Enabled Bandwidth: 0 Circuit Type: level-2-only (Configured: level-1-2) Media Type: Loop Circuit Number: 0 IPv4 Unicast Topology: Enabled Adjacency Formation: Disabled (Intf passive in IS-IS cfg) Prefix Advertisement: Running Policy (L1/L2): -/- Metric (L1/L2): 0/0 Metric fallback: Bandwidth (L1/L2): Inactive/Inactive Anomaly (L1/L2): Inactive/Inactive Weight (L1/L2): 0/0 MPLS Max Label Stack: 0/0/0/0 (PRI/BKP/SRTE/SRAT) MPLS LDP Sync (L1/L2): Disabled/Disabled IPv4 Address Family: Enabled Protocol State: Up Forwarding Address: None (Intf passive in IS-IS cfg) Global Prefix: 172.16.1.1/32 PME Link Delays and Loss: - Loopback2 Enabled Adjacency Formation: Disabled (Passive in IS-IS cfg) Prefix Advertisement: Enabled Bandwidth: 0 Circuit Type: level-2-only (Configured: level-1-2) Media Type: Loop Circuit Number: 0 IPv4 Unicast Topology: Enabled Adjacency Formation: Disabled (Intf passive in IS-IS cfg) Prefix Advertisement: Running Policy (L1/L2): -/- Metric (L1/L2): 0/0 Metric fallback: Bandwidth (L1/L2): Inactive/Inactive Anomaly (L1/L2): Inactive/Inactive Weight (L1/L2): 0/0 MPLS Max Label Stack: 0/0/0/0 (PRI/BKP/SRTE/SRAT) MPLS LDP Sync (L1/L2): Disabled/Disabled IPv4 Address Family: Enabled Protocol State: Up Forwarding Address: None (Intf passive in IS-IS cfg) Global Prefix: 172.16.2.1/32 PME Link Delays and Loss: - GigabitEthernet0/0/0/0 Enabled Adjacency Formation: Enabled Prefix Advertisement: Enabled Bandwidth: 1000000 RSI SRLG: Not Registered Circuit Type: level-2-only (Configured: level-1-2) Media Type: P2P Circuit Number: 0 Extended Circuit Number: 4 Last IIH Received: 11:53:27 (1.80 sec ago), 1497 octets Last IIH Sent: 11:53:22 (6.23 sec ago), 1497 octets Sending next P2P IIH in: 3 s IPv4 BFD: Disabled IPv6 BFD: Disabled Level-2 Adjacency Count: 1 Adjacency Flaps: 1 LSP Pacing Interval: 33 ms PSNP Entry Queue Size: 0 Hello Interval: 10 s Hello Multiplier: 3 CLNS I/O Protocol State: Up MTU: 1497 SNPA: 5254.00fa.e51c Layer-2 Multicast: All ISs: Listening IPv4 Unicast Topology: Enabled Adjacency Formation: Running Prefix Advertisement: Running Policy (L1/L2): -/- Metric (L1/L2): 10/10 Metric fallback: Bandwidth (L1/L2): Inactive/Inactive Anomaly (L1/L2): Inactive/Inactive Weight (L1/L2): 0/0 MPLS Max Label Stack: 1/3/7/7 (PRI/BKP/SRTE/SRAT) MPLS LDP Sync (L1/L2): Disabled/Disabled FRR (L1/L2): L1 Not Enabled L2 Not Enabled FRR Type: None None IPv4 Address Family: Enabled Protocol State: Up Forwarding Address: 10.1.2.1 Global Prefix: 10.1.2.0/24 LSP Transmission is: idle LSP Transmit Timer in: 0 ms LSP Burst Size: 6 LSPs in the next 0 ms LSP Rexmit Queue Size: 0 Adjacency Up: 11:47:43.256 Received CSNP complete: 11:47:44.349 LSP Pacing Start: 11:47:44.256 LSP fast flooding: Disabled PME Link Delays and Loss: - RP/0/RP0/CPU0:R1#show isis interface brief Thu Sep 10 11:53:29.147 UTC IS-IS 1 Interfaces Interface All Adjs Adj Topos Adv Topos CLNS MTU Prio OK L1 L2 Run/Cfg Run/Cfg L1 L2 ----------------- --- --------- --------- --------- ---- ---- -------- Lo0 Yes - - 0/0 1/1 No - - - Lo1 Yes - - 0/0 1/1 No - - - Lo2 Yes - - 0/0 1/1 No - - - Gi0/0/0/0 Yes - 1 1/1 1/1 Up 1497 - - RP/0/RP0/CPU0:R1#show isis neighbors Thu Sep 10 11:53:29.376 UTC IS-IS 1 neighbors: System Id Interface SNPA State Holdtime Type IETF-NSF R2 Gi0/0/0/0 *PtoP* Up 27 L2 Capable Total neighbor count: 1 RP/0/RP0/CPU0:R1#show isis neighbors detail Thu Sep 10 11:53:29.537 UTC IS-IS 1 neighbors: System Id Interface SNPA State Holdtime Type IETF-NSF R2 Gi0/0/0/0 *PtoP* Up 27 L2 Capable Area Address(es): 49.0001 IPv4 Address(es): 10.1.2.2* Topologies: 'IPv4 Unicast' Uptime: 00:05:46 Total neighbor count: 1 RP/0/RP0/CPU0:R1#show isis database Thu Sep 10 11:53:29.702 UTC IS-IS 1 (Level-2) Link State Database LSPID LSP Seq Num LSP Checksum LSP Holdtime/Rcvd ATT/P/OL R1.00-00 * 0x0000000f 0x6214 853 /* 0/0/0 R2.00-00 0x0000000d 0x5930 853 /1199 0/0/0 R2.01-00 0x00000009 0xffd2 865 /1200 0/0/0 R3.00-00 0x00000009 0x3a85 642 /1200 0/0/0 R4.00-00 0x0000000a 0xb8da 869 /1200 0/0/0 Total Level-2 LSP count: 5 Local Level-2 LSP count: 1 RP/0/RP0/CPU0:R1#show isis database detail Thu Sep 10 11:53:29.850 UTC IS-IS 1 (Level-2) Link State Database LSPID LSP Seq Num LSP Checksum LSP Holdtime/Rcvd ATT/P/OL R1.00-00 * 0x0000000f 0x6214 853 /* 0/0/0 Area Address: 49.0001 LSP MTU: 1492 NLPID: 0xcc IP Address: 1.1.1.1 Hostname: R1 Metric: 0 IP 1.1.1.1/32 Metric: 10 IP 10.1.2.0/24 Metric: 0 IP 172.16.1.1/32 Metric: 0 IP 172.16.2.1/32 Metric: 10 IS R2.00 R2.00-00 0x0000000d 0x5930 853 /1199 0/0/0 Area Address: 49.0001 LSP MTU: 1492 NLPID: 0xcc IP Address: 2.2.2.2 Hostname: R2 Metric: 0 IP 2.2.2.2/32 Metric: 10 IP 10.1.2.0/24 Metric: 10 IP 10.2.0.0/24 Metric: 10 IS R1.00 Metric: 10 IS R2.01 R2.01-00 0x00000009 0xffd2 865 /1200 0/0/0 Metric: 0 IS R4.00 Metric: 0 IS R3.00 Metric: 0 IS R2.00 R3.00-00 0x00000009 0x3a85 641 /1200 0/0/0 Area Address: 49.0001 LSP MTU: 1492 NLPID: 0xcc IP Address: 3.3.3.3 Hostname: R3 Metric: 0 IP 3.3.3.3/32 Metric: 10 IP 10.2.0.0/24 Metric: 10 IS R2.01 R4.00-00 0x0000000a 0xb8da 869 /1200 0/0/0 Area Address: 49.0001 LSP MTU: 1492 NLPID: 0xcc IP Address: 4.4.4.4 Hostname: R4 Metric: 0 IP 4.4.4.4/32 Metric: 10 IP 10.2.0.0/24 Metric: 10 IS R2.01 Total Level-2 LSP count: 5 Local Level-2 LSP count: 1 RP/0/RP0/CPU0:R1#show isis topology Thu Sep 10 11:53:30.073 UTC IS-IS 1 paths to IPv4 Unicast (Level-2) routers System Id Metric Next-Hop Interface SNPA R1 -- R2 10 R2 Gi0/0/0/0 *PtoP* R3 20 R2 Gi0/0/0/0 *PtoP* R4 20 R2 Gi0/0/0/0 *PtoP* RP/0/RP0/CPU0:R1#show isis adjacency Thu Sep 10 11:53:30.317 UTC IS-IS 1 Level-2 adjacencies: System Id Interface SNPA State Hold Changed NSF IPv4 IPv6 BFD BFD R2 Gi0/0/0/0 *PtoP* Up 26 00:05:47 Yes None None Total adjacency count: 1 RP/0/RP0/CPU0:R1#show isis adjacency-log Thu Sep 10 11:53:30.458 UTC IS-IS 1 Level 2 Adjacency Log Capacity: 100, Size: 5 When System Interface State Details --- Thu Sep 10 2026 --- 10:51:58.312 R2 Gi0/0/0/0 d -> i 10:51:58.922 R2 Gi0/0/0/0 i -> u New adjacency IPv4 Unicast Up 11:45:34.380 R2 Gi0/0/0/0 u -> d Interface state down IPv4 Unicast Down 11:47:42.648 R2 Gi0/0/0/0 d -> i 11:47:43.256 R2 Gi0/0/0/0 i -> u New adjacency IPv4 Unicast Up RP/0/RP0/CPU0:R1#show isis spf-log Thu Sep 10 11:53:30.590 UTC IS-IS 1 Level 2 IPv4 Unicast Route Calculation Log Capacity: 210, Size: 20 Time Total Trig. Timestamp Type (ms) Nodes Count First Trigger LSP Triggers ------------ ----- ----- ----- ----- -------------------- ---------------------- --- Thu Sep 10 2026 --- 10:50:53.032 FSPF 0 1 7 R1.00-00 CONFIG NEWNODE NEWLSP OVLSET PREFIXGOOD AREAADDR IPADDR 10:50:55.184 FSPF 0 1 1 R1.00-00 OVLCLR 10:50:58.000 PRC 0 1 1 R1.00-00 PREFIXGOOD 10:52:00.368 FSPF 0 2 5 R2.00-00 NEWNODE NEWLSP PREFIXGOOD AREAADDR IPADDR 10:52:03.113 FSPF 0 2 1 R2.00-00 LINKGOOD 10:52:03.514 FSPF 2 2 1 R1.00-00 LINKGOOD 10:52:55.782 FSPF 0 4 9 R3.00-00 NEWNODE NEWLSP LINKGOOD PREFIXGOOD AREAADDR IPADDR 10:52:56.781 FSPF 1 4 2 R2.01-00 LINKGOOD 10:54:04.529 FSPF 0 5 1 R2.01-00 LINKGOOD 10:54:04.745 FSPF 1 5 6 R4.00-00 NEWNODE NEWLSP LINKGOOD PREFIXGOOD AREAADDR IPADDR 11:09:04.797 FSPF 0 5 1 PERIODIC 11:24:04.849 FSPF 0 5 1 PERIODIC 11:30:09.845 PRC 0 5 1 R1.00-00 PREFIXGOOD 11:35:37.374 PRC 0 5 1 R1.00-00 PREFIXBAD 11:37:48.850 PRC 0 5 1 R1.00-00 PREFIXGOOD 11:39:04.900 FSPF 0 5 1 PERIODIC 11:45:34.481 FSPF 52 5 3 R1.00-00 DELADJ LINKBAD PREFIXBAD 11:46:39.383 PRC 0 5 1 R1.00-00 PREFIXGOOD 11:47:42.152 PRC 0 5 1 R1.00-00 PREFIXGOOD 11:47:43.357 FSPF 2 5 1 R1.00-00 LINKGOOD RP/0/RP0/CPU0:R1#show isis lsp-log Thu Sep 10 11:53:30.783 UTC IS-IS 1 Level 2 LSP Generation Log Capacity: 50, Size: 13 When Count Interface Triggers --- Thu Sep 10 2026 --- 10:50:43.153 1 CONFIG 10:50:45.233 1 CONFIG 10:50:50.414 1 Lo0 IPUP 10:50:55.133 1 LSPDBOL 10:50:57.949 1 Gi0/0/0/0 MSD 10:52:03.168 1 Gi0/0/0/0 SABIT 11:30:09.794 1 Unknown IPUP 11:35:37.322 1 IPDOWN 11:37:48.799 1 Lo1 IPUP 11:45:34.431 2 Gi0/0/0/0 DELADJ BESTADJ 11:46:39.300 1 Lo2 IPUP 11:47:42.101 1 Gi0/0/0/0 IPUP 11:47:43.306 1 Gi0/0/0/0 NEWADJ RP/0/RP0/CPU0:R1#show isis statistics Thu Sep 10 11:53:31.062 UTC IS-IS 1 Packet and Event Statistics Dropped Dropped Total PDUs Sent Received On Input By Update Hello: 421 411 0 - CSNP: 2 2 - 0 PSNP: 24 9 0 0 LSP: 11 28 0 0 LSP Retransmissions: 0 LSP Checksum Errors: 0 IS-IS Update Queue: 0/3500 Total Traffic: 39 High Water Mark: 1 HWM Set: Thu 2026 Sep 10 10:51:59.799 UTC Total Drops: 0 IS-IS Input Queue: 0/4200 Total Traffic: 450 High Water Mark: 1 Total Drops: 0 Level-2 LSPs sourced (new/refresh): 15/2 Route Calculations IPv4 Unicast Total: 20 Full SPF Calculations: 14 Periodic: 3 Partial Route Calc: 6 Next Hop Calculations: 0 RP/0/RP0/CPU0:R1#show cef Thu Sep 10 11:53:31.219 UTC Prefix Next Hop Interface ------------------- ------------------- ------------------ 0.0.0.0/0 drop default handler 0.0.0.0/32 broadcast 1.1.1.1/32 receive Loopback0 2.2.2.2/32 10.1.2.2/32 GigabitEthernet0/0/0/0 3.3.3.3/32 10.1.2.2/32 GigabitEthernet0/0/0/0 4.4.4.4/32 10.1.2.2/32 GigabitEthernet0/0/0/0 10.1.2.0/24 attached GigabitEthernet0/0/0/0 10.1.2.0/32 broadcast GigabitEthernet0/0/0/0 10.1.2.1/32 receive GigabitEthernet0/0/0/0 10.1.2.2/32 10.1.2.2/32 GigabitEthernet0/0/0/0 10.1.2.255/32 broadcast GigabitEthernet0/0/0/0 10.2.0.0/24 10.1.2.2/32 GigabitEthernet0/0/0/0 172.16.1.1/32 receive Loopback1 172.16.2.1/32 receive Loopback2 224.0.0.0/4 0.0.0.0/32 224.0.0.0/24 receive 255.255.255.255/32 broadcast