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New Member

Cannot access vSphere ESXi host on UCS

I have ESXi 4.1 installed on B200 M2 blades in UCS.  I can ping the IPs of the ESXi hosts from my computer and ping my computer from the ESXi hosts.  I can't connect to any of the ESXi hosts from my computer with the vSphere client.  I cannot even get to the ESXi welcome webpage on any of the hosts.  Has anyone else experience this problem?

4 REPLIES
Cisco Employee

Cannot access vSphere ESXi host on UCS

Thomas,

Are required TCP ports allowed between your computer network and ESXi hosts ?

http://kb.vmware.com/selfservice/microsites/microsite.do?cmd=displayKC&docType=kc&externalId=1012382&sliceId=1&docTypeID=DT_KB_1_1#VI%20/%20vSphere%20Client

Are management services up and running ? You can try restarting them via console or via SSH session by

services.sh restart

Padma

New Member

Cannot access vSphere ESXi host on UCS

Thank your for the response.  There is no firewall between UCS and my computer.  When I telnet using with port 80 and 902, I get a response.  I tried restarting management services through the console, but it still does not work.  Is there something I might have to check in UCS Manager?  The host are all reachable IP wise.

Cisco Employee

Cannot access vSphere ESXi host on UCS

One quick sanity check is to power off your ESXi host and then verify that the pings stop immediatly.

Can you grab a packet capture from the ESX host and verify you see the connection from your desktop?

on the CLI run this command:

esxcfg-vmknic -l

record the name and ip address of the management interface. It should be vmk0, and please upload a screenshot of the output somewhere with your IP addresses removed.

Then run tcpdump-uw -i vmk0 (or whatever interface it is)

When you attempt to connect to the ESX host you should see a 3 way handshake like in this example from an ESXi 5.0 host:

~ # tcpdump-uw -vv -i vmk0  "not port 22"

tcpdump-uw: WARNING: SIOCGIFINDEX: Invalid argument

tcpdump-uw: listening on vmk0, link-type EN10MB (Ethernet), capture size 96 bytes

14:05:40.058467 ARP, Ethernet (len 6), IPv4 (len 4), Request who-has X.X.X.X (XX:XX:XX:XX:XX:XX (oui Unknown)) tell X.X.X.X, length 46

14:05:40.059677 ARP, Ethernet (len 6), IPv4 (len 4), Reply X.X.X.X is-at XX:XX:XX:XX:XX:XX (oui Unknown), length 28

14:05:44.570073 IP (tos 0x0, ttl 126, id 28062, offset 0, flags [DF], proto TCP (6), length 52)

    X.X.X.X.52926 > X.X.X.X.https: Flags [S], cksum 0xb9f4 (correct), seq 2314467615, win 8192, options [mss 1366,nop,wscale 2,nop,nop,sackOK], length 0

14:05:44.570532 IP (tos 0x0, ttl 64, id 20287, offset 0, flags [DF], proto TCP (6), length 52)

    X.X.X.X.https > X.X.X.X.52926: Flags [S.], cksum 0x4219 (incorrect -> 0x8a63), seq 11685832, ack 2314467616, win 65535, options [mss 1366,nop,wscale 9,sackOK,eol], length 0

14:05:44.572293 IP (tos 0x0, ttl 126, id 28063, offset 0, flags [DF], proto TCP (6), length 40)

    X.X.X.X.52926 > X.X.X.X.https: Flags [.], cksum 0x89d0 (correct), seq 1, ack 1, win 16392, length 0

Look for somethign like:

Flags [S]

Flags [S.]

Flags [.]

to access CLI on ESXi press alt-F1

Finally, running tail -f /var/log/messages will show you the logs which may be helpful (/var/log/vmkernel.log on ESXi 5) but if you just installed it it shoul be working.

New Member

Cannot access vSphere ESXi host on UCS

Thank you for providing a detailed methodology to help troubleshoot this.  Below is a screenshot of the tcpdump when I try to access using http.

 

Below is a tcpdump when I try to access ESXi using the vSphere client.

Below is a screenshot of the log when I try to use https to access ESXi. 

Below is a screenshot of the log when I try to connect using vSphere.

I'm not sure what it means when it shows bytes missing.  Does this look familiar to anyone?

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