RP/0/RP0/CPU0:R1#show version Sun Sep 20 15:16:37.196 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 7 minutes XRd Control Plane Container RP/0/RP0/CPU0:R1#show interface description Sun Sep 20 15:16:37.306 UTC Interface Status Protocol Description -------------------------------------------------------------------------------- Lo0 up up Nu0 up up Mg0/RP0/CPU0/0 up up management Gi0/0/0/0 up up to R2 (10.0.12.0/24 p2p) Gi0/0/0/1 up up to R4 (10.0.14.0/24 p2p) Gi0/0/0/2 admin-down admin-down RP/0/RP0/CPU0:R1#show route Sun Sep 20 15:16:37.594 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, 00:04:54, Loopback0 i L2 2.2.2.2/32 [115/10] via 10.0.12.2, 00:04:43, GigabitEthernet0/0/0/0 i L2 3.3.3.3/32 [115/20] via 10.0.12.2, 00:04:38, GigabitEthernet0/0/0/0 i L2 4.4.4.4/32 [115/30] via 10.0.12.2, 00:04:33, GigabitEthernet0/0/0/0 C 10.0.12.0/24 is directly connected, 00:04:48, GigabitEthernet0/0/0/0 L 10.0.12.1/32 is directly connected, 00:04:48, GigabitEthernet0/0/0/0 C 10.0.14.0/24 is directly connected, 00:04:48, GigabitEthernet0/0/0/1 L 10.0.14.1/32 is directly connected, 00:04:48, GigabitEthernet0/0/0/1 i L2 10.0.23.0/24 [115/20] via 10.0.12.2, 00:04:43, GigabitEthernet0/0/0/0 i L2 10.0.34.0/24 [115/30] via 10.0.12.2, 00:04:38, GigabitEthernet0/0/0/0 RP/0/RP0/CPU0:R1#show route isis Sun Sep 20 15:16:37.894 UTC i L2 2.2.2.2/32 [115/10] via 10.0.12.2, 00:04:43, GigabitEthernet0/0/0/0 i L2 3.3.3.3/32 [115/20] via 10.0.12.2, 00:04:38, GigabitEthernet0/0/0/0 i L2 4.4.4.4/32 [115/30] via 10.0.12.2, 00:04:33, GigabitEthernet0/0/0/0 i L2 10.0.23.0/24 [115/20] via 10.0.12.2, 00:04:43, GigabitEthernet0/0/0/0 i L2 10.0.34.0/24 [115/30] via 10.0.12.2, 00:04:38, GigabitEthernet0/0/0/0 RP/0/RP0/CPU0:R1#show route ipv6 Sun Sep 20 15:16:38.069 UTC % No matching routes found RP/0/RP0/CPU0:R1#show route ipv6 isis Sun Sep 20 15:16:38.214 UTC % No matching routes found RP/0/RP0/CPU0:R1#show isis Sun Sep 20 15:16:38.494 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: 4373 Respawn count: 1 Started: Sun 2026 Sep 20 15:11:31.116 UTC Null0 ready: Sun 2026 Sep 20 15:11:32.607 UTC Protocol shutdown: No System memory state: Normal Last change: never Memory state: Normal Last change: never Last/Initial memory usage/limit: 1595087/2147483648 0% Memory state monitoring interval: 60 s Memory usage/limit: 13844885/2147483648 0% Memory usage specifics (count/bytes): Nodes: 4/1632 LSPs: 4/1674 Links: 8/9792 Prefixes: 12/11040 Nets: 8/5120 Paths: 14/1344 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: Sun 2026 Sep 20 15:11:33.698 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): Wide/Wide 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) GigabitEthernet0/0/0/0 is running actively (active in configuration) GigabitEthernet0/0/0/1 is running actively (active in configuration) RP/0/RP0/CPU0:R1#show isis interface Sun Sep 20 15:16:38.683 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: - 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: 15:16:38 (0.67 sec ago), 1497 octets Last IIH Sent: 15:16:32 (6.04 sec ago), 1497 octets Sending next P2P IIH in: 3 s IPv4 BFD: Disabled IPv6 BFD: Disabled Level-2 Adjacency Count: 1 Adjacency Flaps: 0 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: 5254.0089.38c6 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: 10.0.12.1 Global Prefix: 10.0.12.0/24 LSP Transmission is: idle LSP Transmit Timer in: 0 ms LSP Burst Size: 8 LSPs in the next 0 ms LSP Rexmit Queue Size: 0 Adjacency Up: 15:11:50.513 Received CSNP complete: 15:11:51.514 LSP Pacing Start: 15:11:51.514 LSP fast flooding: Disabled PME Link Delays and Loss: - GigabitEthernet0/0/0/1 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: 15:16:30 (7.93 sec ago), 1497 octets Last IIH Sent: 15:16:33 (5.26 sec ago), 1497 octets Sending next P2P IIH in: 3 s IPv4 BFD: Disabled IPv6 BFD: Disabled Level-2 Adjacency Count: 1 Adjacency Flaps: 0 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: 5254.00f9.cbbf Layer-2 Multicast: All ISs: Listening IPv4 Unicast Topology: Enabled Adjacency Formation: Running Prefix Advertisement: Running Policy (L1/L2): -/- Metric (L1/L2): 100/100 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: 10.0.14.1 Global Prefix: 10.0.14.0/24 LSP Transmission is: idle LSP Transmit Timer in: 0 ms LSP Burst Size: 9 LSPs in the next 0 ms LSP Rexmit Queue Size: 0 Adjacency Up: 15:12:00.629 Received CSNP complete: 15:12:00.936 LSP Pacing Start: 15:12:00.937 LSP fast flooding: Disabled PME Link Delays and Loss: - RP/0/RP0/CPU0:R1#show isis neighbors Sun Sep 20 15:16:38.805 UTC IS-IS 1 neighbors: System Id Interface SNPA State Holdtime Type IETF-NSF R2 Gi0/0/0/0 *PtoP* Up 29 L2 Capable R4 Gi0/0/0/1 *PtoP* Up 21 L2 Capable Total neighbor count: 2 RP/0/RP0/CPU0:R1#show isis neighbors detail Sun Sep 20 15:16:38.974 UTC IS-IS 1 neighbors: System Id Interface SNPA State Holdtime Type IETF-NSF R2 Gi0/0/0/0 *PtoP* Up 29 L2 Capable Area Address(es): 49.0001 IPv4 Address(es): 10.0.12.2* Topologies: 'IPv4 Unicast' Uptime: 00:04:48 R4 Gi0/0/0/1 *PtoP* Up 21 L2 Capable Area Address(es): 49.0001 IPv4 Address(es): 10.0.14.4* Topologies: 'IPv4 Unicast' Uptime: 00:04:38 Total neighbor count: 2 RP/0/RP0/CPU0:R1#show isis topology Sun Sep 20 15:16:39.194 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 30 R2 Gi0/0/0/0 *PtoP* RP/0/RP0/CPU0:R1#show isis database Sun Sep 20 15:16:39.439 UTC IS-IS 1 (Level-2) Link State Database LSPID LSP Seq Num LSP Checksum LSP Holdtime/Rcvd ATT/P/OL R1.00-00 * 0x00000006 0xd9d5 924 /* 0/0/0 R2.00-00 0x00000006 0xda99 917 /1200 0/0/0 R3.00-00 0x00000006 0xbd31 924 /1200 0/0/0 R4.00-00 0x00000005 0x2439 922 /1200 0/0/0 Total Level-2 LSP count: 4 Local Level-2 LSP count: 1 RP/0/RP0/CPU0:R1#show isis database detail Sun Sep 20 15:16:39.614 UTC IS-IS 1 (Level-2) Link State Database LSPID LSP Seq Num LSP Checksum LSP Holdtime/Rcvd ATT/P/OL R1.00-00 * 0x00000006 0xd9d5 924 /* 0/0/0 Area Address: 49.0001 LSP MTU: 1492 NLPID: 0xcc IP Address: 1.1.1.1 Hostname: R1 Metric: 10 IS-Extended R2.00 Metric: 100 IS-Extended R4.00 Metric: 0 IP-Extended 1.1.1.1/32 Metric: 10 IP-Extended 10.0.12.0/24 Metric: 100 IP-Extended 10.0.14.0/24 R2.00-00 0x00000006 0xda99 917 /1200 0/0/0 Area Address: 49.0001 LSP MTU: 1492 NLPID: 0xcc IP Address: 2.2.2.2 Hostname: R2 Metric: 10 IS-Extended R1.00 Metric: 10 IS-Extended R3.00 Metric: 0 IP-Extended 2.2.2.2/32 Metric: 10 IP-Extended 10.0.12.0/24 Metric: 10 IP-Extended 10.0.23.0/24 R3.00-00 0x00000006 0xbd31 924 /1200 0/0/0 Area Address: 49.0001 LSP MTU: 1492 NLPID: 0xcc IP Address: 3.3.3.3 Hostname: R3 Metric: 10 IS-Extended R2.00 Metric: 10 IS-Extended R4.00 Metric: 0 IP-Extended 3.3.3.3/32 Metric: 10 IP-Extended 10.0.23.0/24 Metric: 10 IP-Extended 10.0.34.0/24 R4.00-00 0x00000005 0x2439 921 /1200 0/0/0 Area Address: 49.0001 LSP MTU: 1492 NLPID: 0xcc IP Address: 4.4.4.4 Hostname: R4 Metric: 100 IS-Extended R1.00 Metric: 10 IS-Extended R3.00 Metric: 0 IP-Extended 4.4.4.4/32 Metric: 100 IP-Extended 10.0.14.0/24 Metric: 10 IP-Extended 10.0.34.0/24 Total Level-2 LSP count: 4 Local Level-2 LSP count: 1 RP/0/RP0/CPU0:R1#show isis spf-log Sun Sep 20 15:16:39.774 UTC IS-IS 1 Level 2 IPv4 Unicast Route Calculation Log Capacity: 210, Size: 8 Time Total Trig. Timestamp Type (ms) Nodes Count First Trigger LSP Triggers ------------ ----- ----- ----- ----- -------------------- ---------------------- --- Sun Sep 20 2026 --- 15:11:33.919 FSPF 0 0 2 CONFIG 15:11:44.801 FSPF 0 1 7 R1.00-00 CONFIG NEWNODE NEWLSP OVLSET PREFIXGOOD AREAADDR IPADDR 15:11:47.044 FSPF 0 1 1 R1.00-00 OVLCLR 15:11:49.410 PRC 0 1 1 R1.00-00 PREFIXGOOD 15:11:51.011 FSPF 0 2 5 R2.00-00 NEWNODE NEWLSP PREFIXGOOD AREAADDR IPADDR 15:11:54.211 FSPF 2 2 2 R1.00-00 LINKGOOD 15:11:59.216 FSPF 2 3 7 R3.00-00 NEWNODE NEWLSP LINKGOOD PREFIXGOOD AREAADDR IPADDR 15:12:04.219 FSPF 2 4 8 R4.00-00 NEWNODE NEWLSP LINKGOOD PREFIXGOOD AREAADDR IPADDR RP/0/RP0/CPU0:R1#show running-config router isis Sun Sep 20 15:16:39.893 UTC router isis 1 is-type level-2-only net 49.0001.0010.0100.1001.00 log adjacency changes address-family ipv4 unicast metric-style wide ! interface Loopback0 passive address-family ipv4 unicast ! ! interface GigabitEthernet0/0/0/0 point-to-point address-family ipv4 unicast metric 10 ! ! interface GigabitEthernet0/0/0/1 point-to-point address-family ipv4 unicast metric 100 ! ! !