RP/0/RP0/CPU0:R4#show version Thu Sep 10 11:44:47.862 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 53 minutes XRd Control Plane Container RP/0/RP0/CPU0:R4#show interface description Thu Sep 10 11:44:48.005 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 SW (10.2.0.0/24 LAN) Gi0/0/0/1 admin-down admin-down Gi0/0/0/2 admin-down admin-down RP/0/RP0/CPU0:R4#show route Thu Sep 10 11:44:48.158 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 10.2.0.2, 00:50:42, GigabitEthernet0/0/0/0 i L2 2.2.2.2/32 [115/10] via 10.2.0.2, 00:50:42, GigabitEthernet0/0/0/0 i L2 3.3.3.3/32 [115/10] via 10.2.0.3, 00:50:42, GigabitEthernet0/0/0/0 L 4.4.4.4/32 is directly connected, 00:50:53, Loopback0 i L2 10.1.2.0/24 [115/20] via 10.2.0.2, 00:50:42, GigabitEthernet0/0/0/0 C 10.2.0.0/24 is directly connected, 00:50:47, GigabitEthernet0/0/0/0 L 10.2.0.4/32 is directly connected, 00:50:47, GigabitEthernet0/0/0/0 i L2 172.16.1.1/32 [115/20] via 10.2.0.2, 00:06:59, GigabitEthernet0/0/0/0 RP/0/RP0/CPU0:R4#show route isis Thu Sep 10 11:44:48.463 UTC i L2 1.1.1.1/32 [115/20] via 10.2.0.2, 00:50:42, GigabitEthernet0/0/0/0 i L2 2.2.2.2/32 [115/10] via 10.2.0.2, 00:50:42, GigabitEthernet0/0/0/0 i L2 3.3.3.3/32 [115/10] via 10.2.0.3, 00:50:42, GigabitEthernet0/0/0/0 i L2 10.1.2.0/24 [115/20] via 10.2.0.2, 00:50:42, GigabitEthernet0/0/0/0 i L2 172.16.1.1/32 [115/20] via 10.2.0.2, 00:06:59, GigabitEthernet0/0/0/0 RP/0/RP0/CPU0:R4#show isis Thu Sep 10 11:44:48.777 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: 4166 Respawn count: 1 Started: Thu 2026 Sep 10 10:53:42.717 UTC Null0 ready: Thu 2026 Sep 10 10:53:44.324 UTC Protocol shutdown: No System memory state: Normal Last change: never Memory state: Normal Last change: never Last/Initial memory usage/limit: 1596892/2147483648 0% Memory state monitoring interval: 60 s Memory usage/limit: 13829039/2147483648 0% Memory usage specifics (count/bytes): Nodes: 5/2040 LSPs: 5/2088 Links: 8/9792 Prefixes: 10/3440 Nets: 7/4432 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: Thu 2026 Sep 10 10:53:45.327 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) GigabitEthernet0/0/0/0 is running actively (active in configuration) RP/0/RP0/CPU0:R4#show isis hostname Thu Sep 10 11:44:48.916 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:R4#show isis interface Thu Sep 10 11:44:49.058 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: - GigabitEthernet0/0/0/0 Enabled Adjacency Formation: Enabled Prefix Advertisement: Enabled Bandwidth: 1000000 RSI SRLG: Not Registered Circuit Type: level-2-only (Configured: level-1-2) Media Type: LAN Circuit Number: 1 Last IIH Received: 11:44:48 (0.50 sec ago), 1497 octets Last IIH Sent: 11:44:45 (4.03 sec ago), 1497 octets IPv4 BFD: Disabled IPv6 BFD: Disabled Level-2 Adjacency Count: 2 Adjacency Flaps: 0 LAN ID: R2.01 Priority (Local/DIS): 64/64 Next LAN IIH in: 5 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: 5254.0078.2bb3 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: 10.2.0.4 Global Prefix: 10.2.0.0/24 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 interface brief Thu Sep 10 11:44:49.264 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 - - - Gi0/0/0/0 Yes - 2 1/1 1/1 Up 1497 - 64 RP/0/RP0/CPU0:R4#show isis neighbors Thu Sep 10 11:44:49.429 UTC IS-IS 1 neighbors: System Id Interface SNPA State Holdtime Type IETF-NSF R2 Gi0/0/0/0 5254.00e7.1e24 Up 9 L2 Capable R3 Gi0/0/0/0 5254.0091.e816 Up 29 L2 Capable Total neighbor count: 2 RP/0/RP0/CPU0:R4#show isis neighbors detail Thu Sep 10 11:44:49.578 UTC IS-IS 1 neighbors: System Id Interface SNPA State Holdtime Type IETF-NSF R2 Gi0/0/0/0 5254.00e7.1e24 Up 9 L2 Capable Area Address(es): 49.0001 IPv4 Address(es): 10.2.0.2* Topologies: 'IPv4 Unicast' Uptime: 00:50:48 R3 Gi0/0/0/0 5254.0091.e816 Up 28 L2 Capable Area Address(es): 49.0001 IPv4 Address(es): 10.2.0.3* Topologies: 'IPv4 Unicast' Uptime: 00:50:48 Total neighbor count: 2 RP/0/RP0/CPU0:R4#show isis database Thu Sep 10 11:44:49.727 UTC IS-IS 1 (Level-2) Link State Database LSPID LSP Seq Num LSP Checksum LSP Holdtime/Rcvd ATT/P/OL R1.00-00 0x0000000b 0xa225 779 /1200 0/0/0 R2.00-00 0x0000000b 0x5d2e 1074 /1200 0/0/0 R2.01-00 0x00000008 0x02d1 504 /1200 0/0/0 R3.00-00 0x00000009 0x3a85 1162 /1200 0/0/0 R4.00-00 * 0x00000009 0xbad9 709 /* 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 10 11:44:49.836 UTC IS-IS 1 (Level-2) Link State Database LSPID LSP Seq Num LSP Checksum LSP Holdtime/Rcvd ATT/P/OL R1.00-00 0x0000000b 0xa225 778 /1200 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: 10 IS R2.00 R2.00-00 0x0000000b 0x5d2e 1074 /1200 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 0x00000008 0x02d1 504 /1200 0/0/0 Metric: 0 IS R4.00 Metric: 0 IS R3.00 Metric: 0 IS R2.00 R3.00-00 0x00000009 0x3a85 1161 /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 * 0x00000009 0xbad9 708 /* 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:R4#show isis topology Thu Sep 10 11:44:50.060 UTC IS-IS 1 paths to IPv4 Unicast (Level-2) routers System Id Metric Next-Hop Interface SNPA R1 20 R2 Gi0/0/0/0 5254.00e7.1e24 R2 10 R2 Gi0/0/0/0 5254.00e7.1e24 R3 10 R3 Gi0/0/0/0 5254.0091.e816 R4 -- RP/0/RP0/CPU0:R4#show isis adjacency Thu Sep 10 11:44:50.328 UTC IS-IS 1 Level-2 adjacencies: System Id Interface SNPA State Hold Changed NSF IPv4 IPv6 BFD BFD R2 Gi0/0/0/0 5254.00e7.1e24 Up 9 00:50:48 Yes None None R3 Gi0/0/0/0 5254.0091.e816 Up 28 00:50:48 Yes None None Total adjacency count: 2 RP/0/RP0/CPU0:R4#show isis adjacency-log Thu Sep 10 11:44:50.566 UTC IS-IS 1 Level 2 Adjacency Log Capacity: 100, Size: 4 When System Interface State Details --- Thu Sep 10 2026 --- 10:54:00.514 R2 Gi0/0/0/0 d -> i 10:54:00.514 R3 Gi0/0/0/0 d -> i 10:54:01.439 R2 Gi0/0/0/0 i -> u New adjacency IPv4 Unicast Up 10:54:01.439 R3 Gi0/0/0/0 i -> u New adjacency IPv4 Unicast Up RP/0/RP0/CPU0:R4#show isis spf-log Thu Sep 10 11:44:50.678 UTC IS-IS 1 Level 2 IPv4 Unicast Route Calculation Log Capacity: 210, Size: 11 Time Total Trig. Timestamp Type (ms) Nodes Count First Trigger LSP Triggers ------------ ----- ----- ----- ----- -------------------- ---------------------- --- Thu Sep 10 2026 --- 10:53:56.614 FSPF 0 1 7 R4.00-00 CONFIG NEWNODE NEWLSP OVLSET PREFIXGOOD AREAADDR IPADDR 10:53:58.711 FSPF 0 1 1 R4.00-00 OVLCLR 10:54:01.530 FSPF 0 4 4 R2.01-00 NEWNODE NEWLSP LINKGOOD PREFIXGOOD 10:54:04.528 FSPF 0 4 1 R2.01-00 LINKGOOD 10:54:06.129 FSPF 2 5 19 R4.00-00 NEWNODE NEWLSP LINKGOOD PREFIXGOOD AREAADDR IPADDR 11:09:06.183 FSPF 0 5 1 PERIODIC 11:24:06.234 FSPF 0 5 1 PERIODIC 11:30:09.891 PRC 2 5 1 R1.00-00 PREFIXGOOD 11:35:37.380 PRC 1 5 1 R1.00-00 PREFIXBAD 11:37:48.889 PRC 1 5 1 R1.00-00 PREFIXGOOD 11:39:06.285 FSPF 0 5 1 PERIODIC RP/0/RP0/CPU0:R4#show isis lsp-log Thu Sep 10 11:44:50.923 UTC IS-IS 1 Level 2 LSP Generation Log Capacity: 50, Size: 6 When Count Interface Triggers --- Thu Sep 10 2026 --- 10:53:45.582 1 CONFIG 10:53:47.823 1 CONFIG 10:53:55.211 1 Lo0 IPUP 10:53:58.630 1 LSPDBOL 10:54:01.489 2 Gi0/0/0/0 NEWADJ MSD 10:54:04.689 1 Gi0/0/0/0 DIS RP/0/RP0/CPU0:R4#show isis statistics Thu Sep 10 11:44:51.140 UTC IS-IS 1 Packet and Event Statistics Dropped Dropped Total PDUs Sent Received On Input By Update Hello: 353 1395 0 - CSNP: 0 349 - 0 PSNP: 1 0 0 0 LSP: 6 22 0 0 LSP Retransmissions: 0 LSP Checksum Errors: 0 IS-IS Update Queue: 0/3500 Total Traffic: 371 High Water Mark: 3 HWM Set: Thu 2026 Sep 10 10:54:05.695 UTC Total Drops: 0 IS-IS Input Queue: 0/4200 Total Traffic: 1766 High Water Mark: 3 Total Drops: 0 Level-2 LSPs sourced (new/refresh): 8/3 Route Calculations IPv4 Unicast Total: 11 Full SPF Calculations: 8 Periodic: 3 Partial Route Calc: 3 Next Hop Calculations: 0 RP/0/RP0/CPU0:R4#show cef Thu Sep 10 11:44:51.252 UTC Prefix Next Hop Interface ------------------- ------------------- ------------------ 0.0.0.0/0 drop default handler 0.0.0.0/32 broadcast 1.1.1.1/32 10.2.0.2/32 GigabitEthernet0/0/0/0 2.2.2.2/32 10.2.0.2/32 GigabitEthernet0/0/0/0 3.3.3.3/32 10.2.0.3/32 GigabitEthernet0/0/0/0 4.4.4.4/32 receive Loopback0 10.1.2.0/24 10.2.0.2/32 GigabitEthernet0/0/0/0 10.2.0.0/24 attached GigabitEthernet0/0/0/0 10.2.0.0/32 broadcast GigabitEthernet0/0/0/0 10.2.0.2/32 10.2.0.2/32 GigabitEthernet0/0/0/0 10.2.0.3/32 10.2.0.3/32 GigabitEthernet0/0/0/0 10.2.0.4/32 receive GigabitEthernet0/0/0/0 10.2.0.255/32 broadcast GigabitEthernet0/0/0/0 172.16.1.1/32 10.2.0.2/32 GigabitEthernet0/0/0/0 224.0.0.0/4 0.0.0.0/32 224.0.0.0/24 receive 255.255.255.255/32 broadcast