Right syntax of show conn command
Good day!
Please, help me with correct syntax of show conn command...
I need to show all active tcp connections from inside to outside on port 60565...
Thank you...!
Hi,
Well there are a lot of options.
Below is the basic command
show conn
You can use the below commands to get more detailed information
show conn long
show conn detail
You can show certain port connections with the command (with some added parameters)
show conn detail port 60565
Some variation of the below command might also be helpfull
show local-host
Use the "?" (question mark) after the "show local-host" to see what options you have. Same option naturally applies to any other command on the ASA in general.
I would also suggest checking out the ASA Command Reference when you are unclear of the purpose of a certain command. They are listed in alphabetic order
http://www.cisco.com/en/US/docs/security/asa/command-reference/cmdref.html
- Jouni
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Question about ACE show Conn command (tcp duration)
Hello,
I was checking connections and noticed that I would see the initial connection, but after a short time the connection quits showing up in the counters and the “show conn” command. However the user is still up and working.
This is the command I used:
sho conn serverfarm STAGING-HTTPS detail
The output shows all the connection info from source to destination, and in the ESTABLISHED state.
However, after maybe 2~3 minutes, when I up arrow I don't see any connection info. The web page is still up. If I refresh the web page, I do see the connections come in.
Can someone kindly point me to a document or provide an answer on how long should the connection be stored before they are flushed?
Config profile:
4 real servers
HTTPS protocol
Leastconn for predictor
sticky based on src/dst IP
Thanks,
RamanRaman,
If you would play with a sniffer capture, you could answer the question yourself.
If the browser loads a flash object or a java applet, once it is loaded, you can still work on the page but there is no data transfer.
with a sniffer tool you could see the browser closing the connections.
The default TCP idle timeout on ACE is 1 hour.
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Cisco ACE - "show conn" command queries
Hi all,
i have some queries regarding the "show conn" command in Cisco ACE.
Working Scenario:
VIP : 10.10.10.1
Server 1 : 10.10.20.1
Server 2 : 10.10.20.2
Client: 30.30.30.1
When a client 30.30.30.1 initiates a connection to the VIP on 10.10.10.1, the ACE load balances it to Server 1, 10.10.20.1. Looking at the "show conn" table, it shows that Server 1 is replying back to the Client 30.30.30.1 through the ACE.
Now, my question is when the ACE returns the traffic to the Client, should the Client be seeing the source IP coming from the VIP or Server 1? My understanding is that the Client should be seeing traffic returning from the VIP. But the show conn table does not seem to suggest so.
show conn table
conn-id np dir proto vlan source destination state
----------+--+---+-----+----+---------------------+---------------------+------+
1768 1 in TCP 10 30.30.30.1:9221 10.10.10.1:80 ESTAB
41 1 out TCP 52 10.10.20.1:80 30.30.30.1:9221 CLOSEDDaniel,
The client is expecting a response from the VIP otherwise there would be an asymmetrical routing problem and conns will never complete.
The fact that you're seeing 30.30.30.1 as the destination address is just that the server is able to see client's IP address on the request, when your backend servers sends the reply back to the client this response is forced to go through the ACE, when the ACE looks at the packet it matches with a previously conn created on the flow table so it "NATs" the reply so now the source of the packet is the VIP and destination is 30.30.30.1.
This is a expected behavior as you're not using S-NAT on your network.
HTH.
Pablo -
ACE Sticky Connections, Show Conn Output and Show serverfarm
Hi Community,
I'm deploying a Cisco ACE module and I have some questions about sticky connections and about the output of the show conn command and show serverfarm command.
I have the follwoing configuration:
rserver host srv_1 ip address 10.4.11.14 inservicerserver host srv_2 ip address 10.4.11.18 inserviceserverfarm host farm_144 rserver srv_1 144 weight 1 inservice rserver srv_2 144 weight 3 inservice
sticky ip-netmask 255.255.255.255 address source st_host144
timeout 10080
serverfarm farm_144
class-map match-all vip_144
2 match virtual-address 10.4.11.208 tcp eq 143
policy-map type loadbalance first-match lb_144
class class-default
policy-map multi-match policy_vip_webcache
class vip_webcache_144
loadbalance vip inservice
loadbalance policy lb_144
loadbalance vip icmp-reply active
nat dynamic 411 vlan 411
We can assume that service policy was applied at the interface vlan. So, let's go to the questions:
1- If sticky is enabled the output command "show conn" should show just one entry by ip address?
The real output is:
DC01-ACE-01-PRIMARY-SW1/context_servidores# show conn | inc :143333046 1 in TCP 411 10.2.158.87:3616 10.4.11.208:143 ESTAB 286390 3 in TCP 411 10.2.158.87:3562 10.4.11.208:143 ESTAB310233 1 in TCP 411 10.1.5.87:3424 10.4.11.208:143 ESTAB
Look that the ip address 10.2.158.87 is shown 2 times. In same times, the same ip address is shown 4 times to the same VIP and the same port. Is it a normal behavior?
2- According to the configuration, the srv_2 has weight 3 and srv_1 has weigth 1, but the output of show serverfarm show somethin strange:
DC01-ACE-01-PRIMARY-SW1/context_servidores# show serverfarm farm_144 serverfarm : farm_144, type: HOST total rservers : 2 state : ACTIVE DWS state : DISABLED --------------------------------- ----------connections----------- real weight state current total failures ---+---------------------+------+------------+----------+----------+--------- rserver: srv_1 10.4.11.14:144 1 OPERATIONAL 11 386 0 rserver: srv_2 10.4.11.18:144 3 OPERATIONAL 35 66 0
We can see that the weight is working good, but the total of connections is higher at srv_1 than srv_2. Why?
Somebody can help me to understand better this problem of if its a normal behavior?
Thanks in advance!!Hi Gaurav,
About question 1, I got some informations too. It's perfectly normal the client open 2 or more connections at the same time. The client's application is the responsable. We removed the ACE and put the client directly to the server and the result of the total connections opened was the same.
About question 2, I made some "clears" on the serverfarm, the sticky database and after that, the numbers were more real.
DC01-ACE-02-SECONDARY-SW1/context_servidores# sh serverfarm farm_webcache_144
serverfarm : farm_webcache_144, type: HOST
total rservers : 2
state : ACTIVE
DWS state : DISABLED
----------connections-----------
real weight state current total failures
---+---------------------+------+------------+----------+----------+---------
rserver: srv_webcache_1
10.4.11.14:144 1 OPERATIONAL 1025 15499 4436
rserver: srv_webcache_2
10.4.11.18:144 2 OPERATIONAL 1794 33471 471
DC01-ACE-02-SECONDARY-SW1/context_servidores#
Anyway thank you very much for your feedback.
Plínio Monteiro -
Hi,
Does the ASA have an SNMP OID which will provide information like the show conn command ?2 years later, how's LLDP support via SNMP?
If Cisco does not support LLDP via SNMP, please remove the wrong information from
http://tools.cisco.com/ITDIT/MIBS/MainServlet?ReleaseSel=2514&PlatformSel=231&fsSel=705
Stop lying! -
Can the show conn state command be used to monitor the connections for fix-up protocols?
Use the show port status command to display port status information.
show port status [mod_num[/port_num]]
Syntax Description
mod_num
(Optional) Number of the module.
/port_num
(Optional) Number of the port on the module.
This example shows how to display port status information for all ports:
Console> show port status
Port Name Status Vlan Level Duplex Speed Type
1/1 connected 523 normal half 100 100BaseTX
1/2 notconnect 1 normal half 100 100BaseTX
2/1 connected trunk normal half 400 Route Switch
3/1 notconnect trunk normal full 155 OC3 MMF ATM
5/1 notconnect 1 normal half 100 FDDI
5/2 notconnect 1 normal half 100 FDDI -
Hi Team,
Does the show conn count includes both tcp + udp + embryonic connections.
Because when i do a calculation in excel from the output of show conn, i got the below output.
It was extracted from the command "show local-host | include host|count/limit"
(A):
Total Sum of TCP embryonic count to host = 331
(B):
Total Sum of TCP flow count/limit = 102938
(C):
Total Sum of UDP flow count/limit = 3512505
firewall#show conn count
1912284 in use, 2000002 most used
Please let me know how this is caluclated. If show conn count = A+B+C, then i am suspecting that old connection entries are not getting flushed out from the connection table in cisco asa 5580 with version 8.3.2.
Really im in need of help...Hi Kimberly,
My question was, the count of show conn & show local-host does not match... More over, as the show conn was showing that the max limit of 2 million will be reaching very soon... So, i would like to troubleshoot the output of show local-host | include host|count/limit, where in i could see that one of the webserver has lots of tcp connection (lets say 35000, then the other two servers are consuming udp connections 7lacs,5lacs & 3 lacs, as given below...
local host: ,
TCP flow count/limit = 35857/unlimited
TCP embryonic count to host = 25
UDP flow count/limit = 0/unlimited
local host: ,
TCP flow count/limit = 306/unlimited
TCP embryonic count to host = 8
UDP flow count/limit = 736807/unlimited
local host: ,
TCP flow count/limit = 246/unlimited
TCP embryonic count to host = 2
UDP flow count/limit = 582010/unlimited
local host: ,
TCP flow count/limit = 1/unlimited
TCP embryonic count to host = 0
UDP flow count/limit = 308412/unlimited
can you pls let me know any other commands can be executed to know if any huge embryonic/virus attacks/too many broad casts...... Once i clear the local-host, the connections get reduced from a huge value to low value. i reallly do not know if these are geniue traffic or fake ? or do not know if the connection table is not flushing out old entries.. please help -
Cisco ASA get 'show conn all long' info through snmp
Hi,
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show conn all long
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Does anyone know if this is possible ?
Thanks.
Vladim looking for the solution ? did u ever find out if this was possible?
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IPS Tech Tip - "show tech" command part 2 - IPS dev team webinar
Hi Folks,
The IPS product management and development team would like to invite you to this 30-40 minute webinar followed by Q&A sessions. These will be recorded and put on this forum as well. We hope you can attend.
-Robert
Robert Albach invites you to attend a Web seminar using WebEx. This event requires registration.
Topic: Cisco IPS Tech Tips - show tech part 2
Host: Robert Albach
This month's Cisco IPS Tech Tip will continue December's show tech command discussion. The show tech command holds a wealth of information regarding your IPS's performance and status. Cisco IPS development team members will continue to talk about what all this information means to you and then answers your questions.
Date and Time:
January 27, 2011 10:00 am, Central Standard Time (Chicago, GMT-06:00)
To register for the online event
1. Go to https://cisco.webex.com/ciscosales/onstage/g.php?d=202882129&t=a&EA=ralbach%40cisco.com&ET=85576c2dbfd6dca4b756de40b6728a2b&ETR=5d7e40b0e38f564be0a8bd55114369fc&RT=MiM3&p
2. Click "Register".
3. On the registration form, enter your information and then click "Submit".
Once the host approves your registration, you will receive a confirmation email message with instructions on how to join the event.Sadly we did not get the recording done. The presentation and the example pcaps however are on this forum now.
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Hi
I need to understand, what does RMAN use to read configuration info in case of No Recovery catalog.
We all know that it read from Control file about backup information.
But, when my database is in NOMOUNT mode, I connect to rman target /
Then I run show all; command.
It displays RMAN configuration, Where is this information stored?
Any idea?
Thanks in advanceHi,
Did you compare the output of the <show all ;> commands in nomount and mount (or open) mode?
In nomount you get the defaults :
RMAN configuration parameters are:
CONFIGURE RETENTION POLICY TO REDUNDANCY 1; # default
CONFIGURE BACKUP OPTIMIZATION OFF; # default
CONFIGURE DEFAULT DEVICE TYPE TO DISK; # default
CONFIGURE CONTROLFILE AUTOBACKUP OFF; # default
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO '%F'; # default
CONFIGURE DEVICE TYPE DISK PARALLELISM 1 BACKUP TYPE TO BACKUPSET; # default
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CONFIGURE ENCRYPTION FOR DATABASE OFF; # default
CONFIGURE ENCRYPTION ALGORITHM 'AES128'; # default
CONFIGURE ARCHIVELOG DELETION POLICY TO NONE; # default
In mount mode you get the actual settings:
using target database control file instead of recovery catalog
RMAN configuration parameters are:
CONFIGURE RETENTION POLICY TO REDUNDANCY 1; # default
CONFIGURE BACKUP OPTIMIZATION OFF; # default
CONFIGURE DEFAULT DEVICE TYPE TO DISK; # default
CONFIGURE CONTROLFILE AUTOBACKUP ON;
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO '%F'; # default
CONFIGURE DEVICE TYPE DISK PARALLELISM 1 BACKUP TYPE TO BACKUPSET; # default
CONFIGURE DATAFILE BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default
CONFIGURE ARCHIVELOG BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default
CONFIGURE CHANNEL DEVICE TYPE DISK FORMAT '/backup/DB10G/%U';
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CONFIGURE ENCRYPTION FOR DATABASE OFF; # default
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Regards,
Tycho -
Hi ,
I am getting below error frequently in alert log of database.
ORA-12012: error on auto execute of job 754461
ORA-29279: SMTP permanent error: ORA-29279: SMTP permanent error: 501 Syntax error, parameters in command "RCPT TO:" unrecognized or missing
ORA-06512: at "SYS.UTL_SMTP", line 20
ORA-06512: at "SYS.UTL_SMTP", line 98
ORA-06512: at "SYS.UTL_SMTP", line 240
ORA-06512: at "APPS.EIS_UTIL_PKG", line 94
ORA-06512: at "APPS.HKD_PO_ADDON_PKG", line 110
ORA-06512: at line 1You have a job running in the database. Its job ID is 754461
It looks as if that job runs APPS.HKD_PO_ADDON_PKG
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"Show Diag" command on 3750 IOS 12.1(19)EA1c
Hi,
I'm trying to run the "show diag" command on a 3750 with IOS 12.1(19)EA1c and the command is not recongised. I'm in enable mode and cannot find an equivalent command.
I need to do this as the Cisco Software Advisor is asking for a copy of the output.
Any pointers gladly recived.
Cheers,
GarethHi,
The tool you need is the "Feature Navigator" which can be found here:
http://tools.cisco.com/ITDIT/CFN/jsp/index.jsp
Launch the tool by selecting "Search by Feature"
Searching for "802.1x" gives a list of all those features, select "Wake on LAN support" (for example) and click add, then continue.
The platform box gives a list of all platforms that support the feature, so select 3750.
The lowest feature set is IP Base (you might have something else but worth checking this first as it's the lowest feature set)
This gives a list of about 20 versions of software which support the feature so you can see you need at least 12.2(25)SEC to get this particular feature.
The process is pretty much the same for any feature. If you know the actual command you need (in this case it's "dot1x control-direction" then you could get the same info by just looking it up in the latest command reference as that will also tell you when the feature first appeared.
Finally, if you just want a list of features for a particular release then use the same link and choose search by platform, but be aware this will be a *long* list.
HTH
Andrew. -
Dear all,
If I do a show log command on switch it starts showing logs which are several months old.
How can I filter those to show only last month log -like pipe is one way or anything to be set on switch.
Also if I do sh log and if it starts showing logs for last 6 months then i can't break it and hence might b causing overhead.
Please advise.
Sent from Cisco Technical Support iPhone AppHi,
I believe there is no other options to view the logs options apart from using the pipe filter.
or we can tune the logging level in such a way to capture only the interested message by applying the below options.
There are eight levels of logging. If you specify a particular level of logging for console logging, for example the messages of that level and of the higher levels (numerically lower) are forwarded to the console.
Level
Logging Message
0
Emergencies
1
Alerts
2
Critical
3
Errors
4
Warnings
5
Notifications
6
Informational
7
Debugging
Router(config)# logging monitor error
Now let us discuss the anatomy of the logging messages. Each message is associated with one of the eight levels of logging, which is referred to as the severity of the message
Level Name
Severity
Description
Syslog Definition
Emergencies
0
System unusable
LOG_EMERG
Alerts
1
Immediate action needed
LOG_ALERT
Critical
2
Critical conditions
LOG_CRIT
Errors
3
Error conditions
LOG_ERR
Warnings
4
Warning conditions
LOG_WARNING
Notifications
5
Normal significant conditions
LOG_NOTICE
Informational
6
Informational messages only
LOG_INFO
Debugging
7
Debugging messages
LOG_DEBUG
Hope this helps
Cheers
Somu
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