RP/0/RP0/CPU0:R4#show version Thu Sep 17 00:25:48.095 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 R4 uptime is 1 hour, 9 minutes XRd Control Plane Container RP/0/RP0/CPU0:R4#show interface description Thu Sep 17 00:25:48.275 UTC Interface Status Protocol Description -------------------------------------------------------------------------------- Lo0 up up Nu0 up up Mg0/RP0/CPU0/0 up up management Gi0/0/0/0 admin-down admin-down Gi0/0/0/1 up up to LAN-SW (10.234.0.0/24 broadcast) Gi0/0/0/2 admin-down admin-down RP/0/RP0/CPU0:R4#show route Thu Sep 17 00:25:48.553 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 i L2 1.1.1.1/32 [115/20] via 10.234.0.2, 01:06:28, GigabitEthernet0/0/0/1 i L2 2.2.2.2/32 [115/10] via 10.234.0.2, 01:06:28, GigabitEthernet0/0/0/1 i L2 3.3.3.3/32 [115/10] via 10.234.0.3, 01:06:28, GigabitEthernet0/0/0/1 L 4.4.4.4/32 is directly connected, 01:06:40, Loopback0 i L2 10.1.2.0/24 [115/20] via 10.234.0.2, 01:06:28, GigabitEthernet0/0/0/1 C 10.234.0.0/24 is directly connected, 01:06:34, GigabitEthernet0/0/0/1 L 10.234.0.4/32 is directly connected, 01:06:34, GigabitEthernet0/0/0/1 RP/0/RP0/CPU0:R4#show route isis Thu Sep 17 00:25:48.854 UTC i L2 1.1.1.1/32 [115/20] via 10.234.0.2, 01:06:28, GigabitEthernet0/0/0/1 i L2 2.2.2.2/32 [115/10] via 10.234.0.2, 01:06:28, GigabitEthernet0/0/0/1 i L2 3.3.3.3/32 [115/10] via 10.234.0.3, 01:06:28, GigabitEthernet0/0/0/1 i L2 10.1.2.0/24 [115/20] via 10.234.0.2, 01:06:28, GigabitEthernet0/0/0/1 RP/0/RP0/CPU0:R4#show isis Thu Sep 17 00:25:49.031 UTC IS-IS Router: 1 System Id: 0040.0400.4004 Hostname: R4 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: 4413 Respawn count: 1 Started: Wed 2026 Sep 16 23:18:56.342 UTC Null0 ready: Wed 2026 Sep 16 23:18:57.941 UTC Protocol shutdown: No System memory state: Normal Last change: never Memory state: Normal Last change: never Last/Initial memory usage/limit: 1596873/2147483648 0% Memory state monitoring interval: 60 s Memory usage/limit: 14439948/2147483648 0% Memory usage specifics (count/bytes): Nodes: 5/2040 LSPs: 5/2088 Links: 8/9792 Prefixes: 9/8280 Nets: 6/3744 Paths: 12/1152 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: Wed 2026 Sep 16 23:18:58.752 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) GigabitEthernet0/0/0/1 is running actively (active in configuration) RP/0/RP0/CPU0:R4#show isis interface Thu Sep 17 00:25:49.160 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: 4.4.4.4/32 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: LAN Circuit Number: 1 Last IIH Received: 00:25:49 (0.25 sec ago), 1497 octets Last IIH Sent: 00:25:45 (3.76 sec ago), 1497 octets IPv4 BFD: Disabled IPv6 BFD: Disabled Level-2 Adjacency Count: 2 Adjacency Flaps: 0 LAN ID: R3.01 Priority (Local/DIS): 64/100 Next LAN IIH in: 4 s 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: 5254.0023.4a75 Layer-2 Multicast: All Level-2 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: 10.234.0.4 Global Prefix: 10.234.0.0/24 LSP Transmission is: idle LSP Transmit Timer in: 0 ms LSP Burst Size: 9 LSPs in the next 0 ms LSP fast flooding: Unsupported PME Link Delays and Loss: - RP/0/RP0/CPU0:R4#show isis neighbors Thu Sep 17 00:25:49.389 UTC IS-IS 1 neighbors: System Id Interface SNPA State Holdtime Type IETF-NSF R2 Gi0/0/0/1 5254.0038.bdc1 Up 29 L2 Capable R3 Gi0/0/0/1 5254.004c.94fd Up 8 L2 Capable Total neighbor count: 2 RP/0/RP0/CPU0:R4#show isis database Thu Sep 17 00:25:49.655 UTC IS-IS 1 (Level-2) Link State Database LSPID LSP Seq Num LSP Checksum LSP Holdtime/Rcvd ATT/P/OL R1.00-00 0x00000017 0x9dea 1037 /1199 0/0/0 R2.00-00 0x0000000c 0x3b67 857 /1200 0/0/0 R3.00-00 0x00000009 0xad87 484 /1200 0/0/0 R3.01-00 0x0000000a 0xe43c 1007 /1200 0/0/0 R4.00-00 * 0x00000009 0x66a3 437 /* 0/0/0 Total Level-2 LSP count: 5 Local Level-2 LSP count: 1 RP/0/RP0/CPU0:R4#show isis database detail Thu Sep 17 00:25:49.803 UTC IS-IS 1 (Level-2) Link State Database LSPID LSP Seq Num LSP Checksum LSP Holdtime/Rcvd ATT/P/OL R1.00-00 0x00000017 0x9dea 1037 /1199 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: 0 IP-Extended 1.1.1.1/32 Metric: 10 IP-Extended 10.1.2.0/24 R2.00-00 0x0000000c 0x3b67 857 /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 R3.01 Metric: 0 IP-Extended 2.2.2.2/32 Metric: 10 IP-Extended 10.1.2.0/24 Metric: 10 IP-Extended 10.234.0.0/24 R3.00-00 0x00000009 0xad87 484 /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 R3.01 Metric: 0 IP-Extended 3.3.3.3/32 Metric: 10 IP-Extended 10.234.0.0/24 R3.01-00 0x0000000a 0xe43c 1007 /1200 0/0/0 Metric: 0 IS-Extended R4.00 Metric: 0 IS-Extended R2.00 Metric: 0 IS-Extended R3.00 R4.00-00 * 0x00000009 0x66a3 436 /* 0/0/0 Area Address: 49.0001 LSP MTU: 1492 NLPID: 0xcc IP Address: 4.4.4.4 Hostname: R4 Metric: 10 IS-Extended R3.01 Metric: 0 IP-Extended 4.4.4.4/32 Metric: 10 IP-Extended 10.234.0.0/24 Total Level-2 LSP count: 5 Local Level-2 LSP count: 1 RP/0/RP0/CPU0:R4#show isis statistics Thu Sep 17 00:25:49.931 UTC IS-IS 1 Packet and Event Statistics Dropped Dropped Total PDUs Sent Received On Input By Update Hello: 10 38 0 - CSNP: 0 10 - 0 PSNP: 0 0 0 0 LSP: 0 0 0 0 LSP Retransmissions: 0 LSP Checksum Errors: 0 IS-IS Update Queue: 0/3500 Total Traffic: 10 High Water Mark: 1 HWM Set: Thu 2026 Sep 17 00:24:31.647 UTC Total Drops: 0 IS-IS Input Queue: 0/4200 Total Traffic: 48 High Water Mark: 1 Total Drops: 0 Level-2 LSPs sourced (new/refresh): 0/0 Route Calculations IPv4 Unicast Total: 0 Full SPF Calculations: 0 Periodic: 0 Partial Route Calc: 0 Next Hop Calculations: 0 RP/0/RP0/CPU0:R4#show running-config router isis Thu Sep 17 00:25:50.059 UTC router isis 1 is-type level-2-only net 49.0001.0040.0400.4004.00 log adjacency changes address-family ipv4 unicast metric-style wide ! interface Loopback0 passive address-family ipv4 unicast ! ! interface GigabitEthernet0/0/0/1 address-family ipv4 unicast metric 10 ! ! ! RP/0/RP0/CPU0:R4#show configuration commit list Thu Sep 17 00:25:51.153 UTC SNo. Label/ID User Line Client Time Stamp ~~~~ ~~~~~~~~ ~~~~ ~~~~ ~~~~~~ ~~~~~~~~~~ 1 1000000001 cisco con0_RP0_CPU0 CLI Wed Sep 16 23:20:09 2026 RP/0/RP0/CPU0:R4#show isis adjacency-log Thu Sep 17 00:25:51.354 UTC IS-IS 1 Level 2 Adjacency Log Capacity: 100, Size: 4 When System Interface State Details --- Wed Sep 16 2026 --- 23:19:13.955 R2 Gi0/0/0/1 d -> i 23:19:13.955 R3 Gi0/0/0/1 d -> i 23:19:14.954 R2 Gi0/0/0/1 i -> u New adjacency IPv4 Unicast Up 23:19:14.955 R3 Gi0/0/0/1 i -> u New adjacency IPv4 Unicast Up RP/0/RP0/CPU0:R4#show isis lsp-log Thu Sep 17 00:25:51.520 UTC IS-IS 1 Level 2 LSP Generation Log Capacity: 50, Size: 5 When Count Interface Triggers --- Wed Sep 16 2026 --- 23:18:59.104 1 CONFIG 23:19:08.491 1 Lo0 IPUP 23:19:12.042 1 LSPDBOL 23:19:15.005 2 Gi0/0/0/1 NEWADJ MSD 23:19:16.902 1 Gi0/0/0/1 DIS