Hi!
I have problems bringing up CLNS over ISIS on a GRE Tunnel!
Router1 (R1) sees the CLNS Neighborship of Router2 (R2) but (R2) does not see (R1)!
I do successfully run about 20 GRE Tunnels on R1 to different Routers. This new one is the first I experience problems with!
First I tried different MTU values (clns mtu 1400, 1450, 1476) because of some Google-found discussions - didn´t work! I have no more idea what to try! Can someone please help!?
Here are some show commands:
R1#sh ver
Cisco Internetwork Operating System Software
IOS (tm) 3600 Software (C3640-JS-M), Version 12.2(19a), RELEASE SOFTWARE (fc2)
Copyright (c) 1986-2003 by cisco Systems, Inc.
Compiled Mon 29-Sep-03 23:45 by pwade
Image text-base: 0x60008930, data-base: 0x61454000
ROM: System Bootstrap, Version 11.1(20)AA2, EARLY DEPLOYMENT RELEASE SOFTWARE (fc1)
R1 uptime is 1 year, 46 weeks, 4 days, 12 hours, 55 minutes
System returned to ROM by power-on
System restarted at 23:47:53 zomemez Thu Nov 5 2015
System image file is "flash:c3640-js-mz.122-19a.bin"
cisco 3640 (R4700) processor (revision 0x00) with 98304K/32768K bytes of memory.
R4700 CPU at 100Mhz, Implementation 33, Rev 1.0
Bridging software.
X.25 software, Version 3.0.0.
SuperLAT software (copyright 1990 by Meridian Technology Corp).
TN3270 Emulation software.
4 Ethernet/IEEE 802.3 interface(s)
2 FastEthernet/IEEE 802.3 interface(s)
DRAM configuration is 64 bits wide with parity disabled.
125K bytes of non-volatile configuration memory.
32768K bytes of processor board System flash (Read/Write)
Configuration register is 0x2102
R1#sh run int tu 28
interface Tunnel28
ip address 11.1.1.2 255.255.255.0
clns mtu 1476
clns router isis d0430201
tunnel source Loopback0
tunnel destination 10.87.126.26
end
R1#sh int tu 28
Tunnel28 is up, line protocol is up
Hardware is Tunnel
Internet address is 11.1.1.2/24
MTU 1514 bytes, BW 9 Kbit, DLY 500000 usec,
reliability 255/255, txload 28/255, rxload 28/255
Encapsulation TUNNEL, loopback not set
Keepalive not set
Tunnel source 10.249.252.136 (Loopback0), destination 10.87.126.26
Tunnel protocol/transport GRE/IP, key disabled, sequencing disabled
Checksumming of packets disabled, fast tunneling enabled
Last input 00:00:01, output 00:00:03, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/0 (size/max)
5 minute input rate 1000 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
1817 packets input, 2238605 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
1818 packets output, 2319699 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
R1#sh clns int tu 28
Tunnel28 is up, line protocol is up
Checksums enabled, MTU 1476, Encapsulation TUNNEL
ERPDUs enabled, min. interval 10 msec.
RDPDUs enabled, min. interval 100 msec., Addr Mask enabled
Congestion Experienced bit set at 4 packets
CLNS fast switching enabled
CLNS SSE switching disabled
DEC compatibility mode OFF for this interface
Next ESH/ISH in 16 seconds
Routing Protocol: IS-IS (d0430201)
Circuit Type: level-1-2
Interface number 0x4, local circuit ID 0x103
Neighbor System-ID: 0020.6001.7701
Level-1 Metric: 10, Priority: 64, Circuit ID: rr-wdm-aosi.03
Number of active level-1 adjacencies: 0
Next IS-IS Hello in 1 seconds
R1#show clns nei detail
Area d0430201:
System Id Interface SNPA State Holdtime Type Protocol
0020.6001.7701 Tu28 10.87.126.26 Init 25 L1 IS-IS
Area Address(es): 47.0005.8000.0043.0000.d043.0201
Uptime: 00:07:58
Debug isis adjacencies on R1:
1y46w: ISIS-Adj (d0430201): Rec serial IIH from *Tunnel* (Tunnel28), cir type L1, cir id 00, length 1475
1y46w: ISIS-Adj (d0430201): rcvd state DOWN, old state INIT, new state INIT
R2#sh ver
Cisco IOS Software [Denali], Catalyst L3 Switch Software (CAT3K_CAA-UNIVERSALK9-M), Version 16.3.2, RELEASE SOFTWARE (fc4)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2016 by Cisco Systems, Inc.
Compiled Tue 08-Nov-16 17:31 by mcpre
Cisco IOS-XE software, Copyright (c) 2005-2016 by cisco Systems, Inc.
All rights reserved. Certain components of Cisco IOS-XE software are
licensed under the GNU General Public License ("GPL") Version 2.0. The
software code licensed under GPL Version 2.0 is free software that comes
with ABSOLUTELY NO WARRANTY. You can redistribute and/or modify such
GPL code under the terms of GPL Version 2.0. For more details, see the
documentation or "License Notice" file accompanying the IOS-XE software,
or the applicable URL provided on the flyer accompanying the IOS-XE
software.
ROM: IOS-XE ROMMON
BOOTLDR: CAT3K_CAA Boot Loader (CAT3K_CAA-HBOOT-M) Version 4.26, RELEASE SOFTWARE (P)
R2 uptime is 4 hours, 11 minutes
Uptime for this control processor is 4 hours, 14 minutes
System returned to ROM by reload at 09:19:23 MEST Wed Sep 27 2017
System restarted at 07:24:55 UTC Wed Sep 27 2017
System image file is "flash:/cat3k_caa-universalk9.16.03.02.SPA.bin"
Last reload reason: Reload Command
This product contains cryptographic features and is subject to United
States and local country laws governing import, export, transfer and
use. Delivery of Cisco cryptographic products does not imply
third-party authority to import, export, distribute or use encryption.
Importers, exporters, distributors and users are responsible for
compliance with U.S. and local country laws. By using this product you
agree to comply with applicable laws and regulations. If you are unable
to comply with U.S. and local laws, return this product immediately.
A summary of U.S. laws governing Cisco cryptographic products may be found at:
http://www.cisco.com/wwl/export/crypto/tool/stqrg.html
If you require further assistance please contact us by sending email to
export@cisco.com.
Technology Package License Information:
-----------------------------------------------------------------
Technology-package Technology-package
Current Type Next reboot
------------------------------------------------------------------
ipservicesk9 Permanent ipservicesk9
cisco WS-C3650-24TS (MIPS) processor (revision M0) with 865815K/6147K bytes of memory.
3 Virtual Ethernet interfaces
28 Gigabit Ethernet interfaces
2048K bytes of non-volatile configuration memory.
4194304K bytes of physical memory.
250456K bytes of Crash Files at crashinfo:.
1609272K bytes of Flash at flash:.
0K bytes of at webui:.
Motherboard Assembly Number : 73-15898-05
Model Revision Number : M0
Motherboard Revision Number : B0
Model Number : WS-C3650-24TS
Switch Ports Model SW Version SW Image Mode
------ ----- ----- ---------- ---------- ----
* 1 28 WS-C3650-24TS 16.3.2 CAT3K_CAA-UNIVERSALK9 BUNDLE
R2#sh run int tu 28
interface Tunnel28
ip address 11.1.1.1 255.255.255.0
tunnel source Loopback500
tunnel destination 10.249.252.136
clns mtu 1476
clns router isis d043.0201
R2#sh clns int tu 28
Tunnel28 is up, line protocol is up
Checksums enabled, MTU 1476, Encapsulation TUNNEL
ERPDUs enabled, min. interval 10 msec.
RDPDUs enabled, min. interval 100 msec., Addr Mask enabled
Congestion Experienced bit set at 4 packets
CLNS fast switching enabled
CLNS SSE switching disabled
DEC compatibility mode OFF for this interface
Next ESH/ISH in 52 seconds
Routing Protocol: IS-IS
Circuit Type: level-1-2
Interface number 0x1, local circuit ID 0x100
Level-1 Metric: 10, Priority: 64, Circuit ID: sw-muenchen-po.00
Level-1 IPv6 Metric: 10
Number of active level-1 adjacencies: 0
Next IS-IS Hello in 5 seconds
if state DOWN
R2#sh int tu 28
Tunnel28 is up, line protocol is up
Hardware is Tunnel
Internet address is 11.1.1.1/24
MTU 17868 bytes, BW 100 Kbit/sec, DLY 50000 usec,
reliability 255/255, txload 2/255, rxload 1/255
Encapsulation TUNNEL, loopback not set
Keepalive not set
Tunnel linestate evaluation up
Tunnel source 10.87.126.26 (Loopback500), destination 10.249.252.136
Tunnel Subblocks:
src-track:
Tunnel28 source tracking subblock associated with Loopback500
Set of tunnels with source Loopback500, 1 member (includes iterators), on interface <OK>
Tunnel protocol/transport GRE/IP
Key disabled, sequencing disabled
Checksumming of packets disabled
Tunnel TTL 255, Fast tunneling enabled
Tunnel transport MTU 1476 bytes
Tunnel transmit bandwidth 8000 (kbps)
Tunnel receive bandwidth 8000 (kbps)
Last input never, output 00:00:07, output hang never
Last clearing of "show interface" counters 03:46:57
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/0 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
0 packets input, 0 bytes, 0 no buffer
Received 0 broadcasts (0 IP multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
1833 packets output, 2258281 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 unknown protocol drops
0 output buffer failures, 0 output buffers swapped out
