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Webcast-Catalyst9k
New Member

ICMP response

we had a server with ip 10.1.100.17, connected to LAN.but now tht server is shutdown. but still when i ping the IP this is wht i get

Pinging 10.1.100.17 with 32 bytes of data:

Reply from 10.1.100.17: bytes=32 time<1ms TTL=255

Reply from 10.1.100.17: bytes=32 time<1ms TTL=255

Request timed out.

Reply from 10.1.100.17: bytes=32 time<1ms TTL=255

atleast one packet loss. But we know the server isnt connected. The layer 3 switch 6509 with

6509> (enable) sh module 15

Mod Slot Ports Module-Type Model Sub Status

--- ---- ----- ------------------------- ------------------- --- --------

15 1 1 Multilayer Switch Feature WS-F6K-MSFC2 no ok

Mod Module-Name Serial-Num

--- -------------------- -----------

15 SAD05060Y0K

when is look at my arp table on my pc it shows 00-d0-04-f4-ab-fc

weh checked on the switch with

_6509> (enable) sh cam msfc 15 100

Physical MAC-Address for Module 15 interfaces: 00-d0-04-f4-ab-fc

VLAN Destination MAC Destination Ports or VCs

---- ------------------ ------------------------

100 00-d0-04-f4-ab-fc 15/1

Total Matching CAM Entries Displayed = 1

Its the mac address of module 15 which the engine..whats wrng? whts going on?

14 REPLIES
Cisco Employee

Re: ICMP response

Any possibility that the MSFC is configured with this specific address?

Hope this helps,

Harold Ritter
Sr. Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
México móvil: +52 1 55 8312 4915
Cisco México
Paseo de la Reforma 222
Piso 19
Cuauhtémoc, Juárez
Ciudad de México, 06600
México

Re: ICMP response

what i would suggest you is, just login to the layer 3 module, type "show ip arp 10.1.100.17" juz find the mac-address of this ip address & then come out from the layer 3 module from the cisco 6509 switch interface type "show cam ab:cd:ef:gh:ij:kl" it should show where exactly the mac-address is residing, with that you can come to know whether the MSFC is using the IP address or it is pointing to any other pc.

eg.

Cat6509>(enable)session 15

MSFC#show ip arp 10.1.100.17

Protocol Address Age (min) Hardware Addr Type Interface

Internet 10.1.100.17 0 abc.efgh.ijkl ARPA Vlan2

Cat6509>(enable)show cam ab:cd:ef:gh:ij:kl

VLAN Dest MAC/Route Des [CoS] Destination Ports or VCs / [Protocol Type]

---- ------------------ ----- -------------------------------------------

2 ab-cd-ef-gh-ij-kl 1/1 [ALL]

hope this helps.

rate this post if cleared.

New Member

Re: ICMP response

Thanks , its the MSFC using the ip .below is the output from show mac output..and its the module on which msfc is connected. But why wd MSFC suddenly use this IP. how do i make it not to use it?

2 00-d0-04-f4-ab-fc R#

100 00-d0-04-f4-ab-fc R#

101 00-d0-04-f4-ab-fc R#

102 00-d0-04-f4-ab-fc R#

103 00-d0-04-f4-ab-fc R#

104 00-d0-04-f4-ab-fc R#

105 00-d0-04-f4-ab-fc R#

106 00-d0-04-f4-ab-fc R#

107 00-d0-04-f4-ab-fc R#

108 00-d0-04-f4-ab-fc R#

109 00-d0-04-f4-ab-fc R#

110 00-d0-04-f4-ab-fc R#

New Member

Re: ICMP response

How do i make MSFC to stop using the IP 10.1.100.17? because when i connect a system on VLAN 100 i cd see logs of duplicate ip on vlan

whts the command to make it nt to use it

Re: ICMP response

I think the IP address might be set on that interface manually, can you post the configuration on the msfc? based on that lemme c watt exactely the problem

New Member

Re: ICMP response

No the running config of msfc doesnt have anything with 10.1.100.17..this is ver ..we also run catos of 6509 switch

The IOS ver

#sh ver

Cisco Internetwork Operating System Software

IOS (tm) MSFC2 Software (C6MSFC2-JSV-M), Version 12.1(19)E1, EARLY DEPLOYMENT RE

LEASE SOFTWARE (fc2)

TAC Support: http://www.cisco.com/tac

Copyright (c) 1986-2003 by cisco Systems, Inc.

Compiled Mon 30-Jun-03 14:51 by nmasa

Image text-base: 0x40008C00, data-base: 0x41BCA000

ROM: System Bootstrap, Version 12.2(17r)S1, RELEASE SOFTWARE (fc1)

BOOTLDR: MSFC2 Software (C6MSFC2-JSV-M), Version 12.1(19)E1, EARLY DEPLOYMENT RE

LEASE SOFTWARE (fc2)

mfl-rtr_ln_sec_6509 uptime is 28 weeks, 3 days, 19 hours, 3 minutes

System returned to ROM by power-on

System restarted at 17:29:12 BST Sat Apr 8 2006

System image file is "bootflash:c6msfc2-jsv-mz.121-19.E1.bin"

cisco MSFC2 (R7000) processor with 229376K/32768K bytes of memory.

Processor board ID SAL08332CEB

R7000 CPU at 300Mhz, Implementation 39, Rev 3.3, 256KB L2, 1024KB L3 Cache

Last reset from power-on

Bridging software.

X.25 software, Version 3.0.0.

SuperLAT software (copyright 1990 by Meridian Technology Corp).

TN3270 Emulation software.

18 Virtual Ethernet/IEEE 802.3 interface(s)

509K bytes of non-volatile configuration memory.

32768K bytes of Flash internal SIMM (Sector size 512K).

Configuration register is 0x102

How do i check if the ip is assigned to MSFC..which command can i try

The cat os ver

> (enable) sh ver

WS-C6509 Software, Version NmpSW: 8.3(2)

Copyright (c) 1995-2004 by Cisco Systems

NMP S/W compiled on May 28 2004, 22:52:31

System Bootstrap Version: 6.1(3)

System Boot Image File is 'bootflash:cat6000-sup2k8.8-3-2.bin'

System Configuration register is 0x2

Hardware Version: 2.0 Model: WS-C6509 Serial #: SCA052200CC

PS1 Module: WS-CAC-1300W Serial #: SON05031858

PS2 Module: WS-CAC-1300W Serial #: SON04502667

Mod Port Model Serial # Versions

--- ---- ------------------- ----------- --------------------------------------

1 2 WS-X6K-SUP2-2GE SAD050608HF Hw : 2.2

Fw : 6.1(3)

Fw1: 6.1(3)

Sw : 8.3(2)

Sw1: 8.3(2)

WS-F6K-PFC2 SAD050610PM Hw : 1.3

Sw :

WS-X6K-SUP2-2GE SAD050608HF Hw : 2.2

Sw :

3 8 WS-X6408A-GBIC SAL05217VME Hw : 2.0

Fw : 5.4(2)

Sw : 8.3(2)

4 8 WS-X6408A-GBIC SAD04310CSC Hw : 1.6

Fw : 5.4(2)

Sw : 8.3(2)

5 8 WS-X6408A-GBIC SAL06240XWX Hw : 2.1

Fw : 5.4(2)

Sw : 8.3(1152)

15 1 WS-F6K-MSFC2 SAD05060Y0K Hw : 1.2

Fw : 12.1(4)E3

Sw : 12.1(4)E3

DRAM FLASH NVRAM

Module Total Used Free Total Used Free Total Used Free

------ ------- ------- ------- ------- ------- ------- ----- ----- -----

1 131072K 76831K 54241K 32768K 31626K 1142K 512K 367K 145K

New Member

Re: ICMP response

I cant see the ip address assigned to MSFC anywhere. are we right to say its being used by MSFC

Re: ICMP response

Once you type "show ip arp 10.1.100.17" in the MSFC, what MAC-Address you see?, & then from the "6509>(enable)show cam " is it poiting to the MSFC?

New Member

Re: ICMP response

Yes, thts wht i pasted before

6509> (enable) sh cam 00-d0-04-f4-ab-fc

100 00-d0-04-f4-ab-fc R# 15/1

101 00-d0-04-f4-ab-fc R# 15/1

102 00-d0-04-f4-ab-fc R# 15/1

---------------------------------------------6509#sh ip arp 10.1.100.17

Protocol Address Age (min) Hardware Addr Type Interface

Internet 10.1.100.17 - 00d0.04f4.abfc ARPA Vlan100

but how do i make msfc not use it, wht shd i do?

Re: ICMP response

Hi,

Please login to MSFC and then paste the output from " show config " and " show ip int brief". It should list the address, if used by the MSFC.

What happens if you clear the ARP on msfc " clear ip arp ".

regards,

-amit singh

Re: ICMP response

Hi,

can you give me the output of the interface vlan 100?

show run interface vlan 100

New Member

Re: ICMP response

interface Vlan100

ip address 10.1.100.2 255.255.255.0

no ip redirects

ip pim sparse-dense-mode

standby 100 priority 200 preempt

standby 100 ip 10.1.100.1

New Member

Re: ICMP response

clear the arp , and ping the ip again doesnt help..if msfc is using it i cant figure why? because the config doesnt show anything line with 10.1.100.17..

Re: ICMP response

This is something a strange behavior is happening. but can you tell me how many vlans are created in the msfc & make sure that this ip address is not set even as a standby IP address. this is might b silly, could you juz restart the switch during the night or day time after working hours. it might help.

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