Cisco Switching/Routing :: MAC Without Port Number Cat6500
Oct 30, 2012
We have IP device on the farm switch(cat6500, which is an access layer siwtch), with the gateway on the core switches (Nexus7000), on the core when I do show ip arp, I found the mac.But when I do sh mac add add of that mac there is no port attached to that mac.
Since that particular vlan only resides on the cat 6500 and two cores, so I logged in to the 6500, and when I show mac- in that vlan, I didn’t find that mac addresss. Instead, I found another mac address with last 8bit are the same of that mac.
Is it some kind VIP of the mac? How so, if no port, how can the switch forward the frame? [code]
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Apr 17, 2013
If I monitor a trunkport on the rootbridge in both directions I get Duplicate Multicast Packets on the perticular VLAN. The first guess is, that this is worked as designed and not a IOS Bug (Platform CAT6500 SUP720 IOS 12.2(33)SXI9 ) Until know I only found an old Cisco press link from 2002 with this subject.
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May 12, 2012
I have configured the following access-list on routers fa0 interface (i am using 1801)
access-list 111 permit ip any any log
and applied it in "in" direction on Fa0 interface.
Now when i am sending ssh packets to this interface its showing below
*May 14 05:09:00.104: %SEC-6-IPACCESSLOGP: list 111 permitted tcp 172.18.128.2(0) -> 172.18.128.146(0), 1 packet
why its not showing any port number ?
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Jan 1, 2012
Clarifying whats the correct # of port asic in WS-X6704-LC?According to the following link (Catalyst 6500 Architectural white paper): [URL]
"In the WS-X6704-10GE line card, there are two port ASICs each supporting 2 x 10 Gigabit Ethernet ports"
While in the document: Understanding Quality of Service on the Catalyst 6500 Switch: [URL]
Table 10.
WS-X6704
Number of 10 GE Ports 4
- QoS on 10-Gigabit Ethernet Line Cards (WS-X6704-10GE)
So whats correct? 4 port asic or 2 port asic?
# Port ASIC’s on the linecard 4
# Physical Ports per Port ASIC 1
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Apr 23, 2013
Are you only able to have two sessions for port mirroring on a Cisco 4510?
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Dec 2, 2012
I'm developing a project where I use the SNMP protocol to discover the network. By discovering the network I mean go through all the routers and switches and retrieve the IP routing table from routers and the forwarding table from switches. With the routers I have no problem. For the switches I need to know for each port the MAC addresses and the Vlans. Basically it's use SNMP to find a port number from a MAC address. To do that i followed this tutorial: [URL]
The problem is that I'm using a Cisco 3725 Router with IOS 12.4 (21) and a NM-16ESW module to work as a Switch and when I use the OID .1.3.6.1.2.1.17 corresponding to the BRIDGE-MIB as it follows:
snmpwalk -v2c -c myrouter 10.1.1.5 .1.3.6.1.2.1.17
it returns:
SNMPv2-SMI::mib-2.17.1.1.0 = Hex-STRING: 00 00 00 00 00 00
SNMPv2-SMI::mib-2.17.1.2.0 = INTEGER: 0
SNMPv2-SMI::mib-2.17.1.3.0 = INTEGER: 4
From this I guess there's no information on the router about Vlans or anything. Other thing is that when I use community string indexing it returns a timeout. My theory is that this version doesn't support indexing but I don't know.
how can I get the Port Number from a MAC address from this "switch" (it's a router working as a switch) using SNMP?
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Jan 3, 2012
I'm in the middle of a Nexus 5000 project and recognized today while configuring port-channels, that some of the interface numbers are reserved for internal use.
Is it possible to change or configure which port-channel interface numbers are allocated for internal use by NX-OS?
Unfortunatly I wasn't able to find a solution for this issue in the offical Nexus documentation, the search function of this forum or Google. If I did miss something or didn't look careful enough at the Nexus docs, I'm also happy with RTFM (... fine manual) responses and links to the info :-)
Additional info:
Nexus5k(config)# interface port-channel 128 ignored port-channel128: internally used, configuration not allowed
Port-Channels 111, 113, 115, 119, 121, 200, 211, 222 were created manually, but 127 - 129 were not.
Nexus5k# show port-channel usage
Total 11 port-channel numbers used
============================================
Used : 111 , 113 , 115 , 119 , 121 , 127 - 129 , 200 , 211 , 222
Unused: 1 - 110 , 112 , 114 , 116 - 118 , 120 , 122 - 126 , 130 - 199
201 - 210 , 212 - 221 , 223 - 4096
[Code]......
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Jun 19, 2012
how to clear vty line? Please see below. A sh tcp <line number> shows that the TCB is waiting for TCP Process. The TCP processs TCB is waiting for is SSH. I believe because of this ssh process still running, the vty line cannot be cleared.
sh users
Line User Host(s) Idle Location
1 vty 0 pf 10.10.20.8 9w1d 10.10.1.54
2 vty 1 pf 10.10.1.16 35w0d 10.10.1.54
3 vty 2 pf 10.10.1.16 1y14w 10.10.1.54
[code].....
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Jan 1, 2012
What this crash means? This is a 6509 with a single Sup720 Cisco IOS Software, s72033_rp Software (s72033_rp-ADVIPSERVICESK9_WAN-M), Version 12.2(33)SXI, RELEASE SOFTWARE (fc2)System returned to ROM by s/w reset at 04:42:07 PST8PDT Mon Jan 2 2012 (SP by bus error at PC 0x40C6681C, address 0x424B).
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Jun 4, 2012
I am planning to upgrade my cat6500 using ISSU but can not find my doc to follow yet.
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Apr 12, 2012
Using the new SUP-2T, need to clarify one query. If we are using the new SUP-2T in VSS mode, will the new ASA service module and NAM-3 are supported? From Cisco site, ASA module FAQ:
Q. Will the ASA Services Module support the Cisco Catalyst Virtual Switching System (VSS) at FCS?
A. Yes, depending on which supervisor you use. The ASA Services Module supports VSS either as a single firewall or as a failover pair of firewalls, when used with the Supervisor 720-10G (VS-S720-10G-3C and VS-S720-10G-3CXL). Transparent and multi- context modes also work with the VSS in this configuration. However, though the SUP 720-3B (WS-SUP720-3B and WS-SUP720-3BXL) is supported by the ASA Services Module, it is not capable of supporting the VSS. No reference to Supervisor-2T.
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Jan 11, 2012
I wonder whethere it is possible to check the the IOS version on the standby sup720 of a 6500? if yes, what command would you use?
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Mar 16, 2011
i will be creating combination of SPAN and RSPAN on catalyst 6506 according to the link
[URL]
im planning to implement this on two 6506 switches will this work? or do i violate the number of monitor session? sorce span?
sw1
monitor session 1 source interface Fa5/18monitor session 1 destination interface Fa5/48
monitor session 2 source interface Fa6/34monitor session 2 destination interface
[Code].....
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Nov 15, 2012
I get a unclear log entry in a VSS system.
Me_Kr #1 ME_KR_ERROR_CNT_LTL_PARITY_ERR_ITRP_0_0[01C8] : INTR= 0001 MASK= 0001
Me_Kr #1 ME_KR_ERROR_CNT_LTL_PARITY_ERR_ITRP_0_0[01C8] : INTR= 0001 MASK= 0001
Me_Kr #1 ME_KR_ERROR_CNT_LTL_PARITY_ERR_ITRP_0_0[01C8] : INTR= 0001 MASK= 0001
Me_Kr #1 ME_KR_ERROR_CNT_LTL_PARITY_ERR_ITRP_0_0[01C8] : INTR= 0001 MASK= 0001
[code]....
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Mar 27, 2013
I am having problems with IGMP and QoS on CAT6500 platform with SUP720 engine.The problem is, it seems that all IGMP packets are getting marked with DSCP 48 when sent out of the switch regardless of any input service policy. I found several articles saying that PFC QoS does not apply to IGMP packets. However in IOS 15 that should be possible, but I didn't get it to work there either. [code]
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Feb 10, 2013
I recently rebuilt the configuration of our Cat6500 multilayer device for use as a user stack. The device is funtioning as it should be, but I am unable to set SSH using the 'crypto key generate rsa' command. The crytop command isn't avaiable at all, which suggests a firmware issue.
I have configured a hostname and Ip domain-name and the image is the only one available.
The show version output is listed below.
show verCisco Internetwork Operating System SoftwareIOS (tm) s72033_rp Software (s72033_rp-IPSERVICES_WAN-VM), Version 12.2(18)SXF12, RELEASE SOFTWARE (fc2)Technical Support: [URL] Copyright (c) 1986-2007
[Code].....
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Jan 30, 2013
i have a campus network with 2 core Cat6500 and multiple 4500 series distribution switches plus 2960 series access switches,we have deployed IPTV system in the network but currently 50 TVs are working through sattelite stream from streaming server Cisco's DCM 9900.we are planning to add more 300 TVs in the network and i am wondering that when all of them will be deployed then what will happen for switches cpu utilizations when all the Tvs will be running on the same time with different different channels.
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Jun 13, 2012
Our organization currently has a Cisco 4507 acting as our core switch and 2 ASA525 firewalls.
Our existing ISP runs into our 4507. Here is the port config.
interface GigabitEthernet7/1
description ISP-DSL
switchport access vlan 10
[Code].....
We have recently purchased a 5Mbit line with a second ISP and will have the line activated tomorrow. In addition, we recently obtained our AS number through ARIN. How would I configure the second ISP to be used for load balancing/failover?
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Dec 10, 2011
How can i find the serial number of sup-720 which is totally dead and not boot?By which sticker on SUP and where ? How many digits ?
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Apr 19, 2012
I am configuring my first 2911 using a SFP card but I dont know the interface name for this module.
show inv shows the card..
What is the interface number for this card or if it needs some config before it will recognize the interface?
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Mar 18, 2012
We have the need to create a large number of VLANs on one of our networks. We're talking about 60! These will all terminate on a pair of 6509-E switches (building core). We use MSTP as a standard on our network so I'm going to stick with that so that we can dramatically reduce the number of STP instances needed. However, regarding the SVIs (default gateways) is there any reason why creating 60 of these guys would be considerd a big no-no? Or would you expect the 6509s to deal with them like a boss?
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Sep 23, 2012
On a Cisco 3560 with IP services ver. 12.2(35)SE5 I have tried to config BGP with a 6-digit AS number, and it is not possible. What software is needed for 6 digit AS number for PI IP addresses, and do I need to buy a new switch also.
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Feb 17, 2007
Whether Cisco has part number for the large fan in 2811. I know p/n for small fan is already there, but I can't find any for large one( I think it s fan 3).
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Oct 16, 2011
I have about (12x) AS 5350 XM installed in a remote site. I would like to know their serial numbers (the one on the sticker outside the AS) I know that this SN begins with JMX and contains 11 characters. When tel netting those AS, and type the following commands : show inventory, show hardware, show version, show diag.. i can't find those serial numbers. I can find others which begins with JAE !
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Jan 5, 2012
If multilayer switch has routing capabilities then why we can go for dedicated router?
Why we cannot use a number for VLAN ID other than 1 to 4094 ?
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Mar 21, 2012
Is there a CLI-command to see the serial number of the flexstack module installed in a C2960S.
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Apr 30, 2013
We currently have a stack of 5 x 3750 switches and i want to remove switch number 3 (it has the least number of things plugged in). What will happen to switch 4 and 5 will they be renumbered 3 and 4, and will the config automatically update this if it does?
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Jan 11, 2012
Is there a maximum number of licenses for connections to a 877?The reason I ask is that our routers are managed by a datacentre and when I asked for the login details I was told that I couldnt have them due to licensing reasons with no other explanation.
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Aug 28, 2012
I have a 6509-E chassis that was prevoius in a VSS configuration. Due to some VSL failures I had to cobvert it to a standalone chassis but would like to bring it back to a virtual system.
Whenever I try to convert it by using the command "switch convert mode virtual" I get the msg %Please configure local switch number first". After doing so by entering the CLI cmd "switch set switch_num 1 local" I still get the same message.
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Jun 6, 2013
we have inserted into a network with VTP a Cisco Switch 2960-S, not knowing that had installed IOS LAN lite.Now I discovered that it can handle up to 64 vlan. In the network there are currently configured 62 VLAN: what happens when we exceeded the max number (64) of VLAN for that switch?
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Aug 12, 2012
I found increasing number of overrun in the tengigabit interface. The hardware is 6509 with sup720-3B and the overrun output is shown in WS-X6716-10GE module. The connected device to WS-X6716-10GE is EMC Islion S200. I think the capability of WS-X6716-10GE can handle EMC NAS device and the load is not so busy. So I have no idea of handling this and the reason why this overrun packet is shown.
[Code]...
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Apr 19, 2013
what is the maximum number of etherchannels i can build on a Cisco 2960S stack. We hoping to connected 15 servers using 2 port channels between two stacked 2960 for redunancey. So what is the max number of channels can i build using the 2960S? Is the max 6 or is it more?
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May 15, 2012
Although I am quite used to using the WLC 4402 and the attached APs, I have no knowledge about licensing and I'm wondering if it has a limited number of AP's that can be controlled by the WLC? I'm not planning on adding 1000's but at the moment we have 21 and will probably be adding an additional 30 in the near future.
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