Standby cisco ACE loadbalancer issues (network connectivity)

Hi ALL,
            We are having issues with the secondary (standby) load balancer ACE module on a 6500 switch. We see that the loadblanacer is not able to get onto the network which leads to problem with fault tolerance as well. Following is the ft status found on the load balancer for one of the contexts (this is the same pattern seen on all the contexts).
switch/Admin# sh ft group status
FT Group                     : 1
Configured Status            : in-service
Maintenance mode             : MAINT_MODE_OFF
My State                     : FSM_FT_STATE_ACTIVE
Peer State                   : FSM_FT_STATE_UNKNOWN
Peer Id                      : 1
No. of Contexts              : 1
Sh arp on all the contexts shows the gateway/rserver to be unreachable. Please find the screenshot below for one of the contexts (the same pattern is seen on the LB for all other contexts)
switch/1_Context# sh arp
Context CSD_Context
================================================================================
IP ADDRESS      MAC-ADDRESS        Interface Type      Encap NextArp(s) Status
================================================================================
172.21.128.97   00.00.00.00.00.00 vlan942   GATEWAY    -                   dn
172.21.128.103 00.0b.fc.fe.1b.09 vlan942   ALIAS      LOCAL     _         up
172.21.128.105 00.12.43.dc.93.23 vlan942   INTERFACE LOCAL     _         up
7.0.0.4         00.0b.fc.fe.1b.09 vlan943   NAT        LOCAL     _         up
- 7.0.0.6
172.21.147.196 00.0b.fc.fe.1b.09 vlan943   ALIAS      LOCAL     _         up
172.21.147.198 00.12.43.dc.93.24 vlan943   INTERFACE LOCAL     _         up
172.21.147.200 00.00.00.00.00.00 vlan943   RSERVER    -       * 3 req     dn
172.21.147.202 00.00.00.00.00.00 vlan943   RSERVER    -       * 2 req     dn
172.21.147.204 00.00.00.00.00.00 vlan943   RSERVER    -                   dn
172.21.147.206 00.00.00.00.00.00 vlan943   RSERVER    -                   dn
172.21.147.208 00.00.00.00.00.00 vlan943   RSERVER    -       * 3 req     dn
172.21.147.210 00.00.00.00.00.00 vlan943   RSERVER    -       * 2 req     dn
172.21.147.212 00.00.00.00.00.00 vlan943   RSERVER    -       * 1 req     dn
172.21.147.214 00.00.00.00.00.00 vlan943   RSERVER    -       * 1 req     dn
172.21.147.216 00.00.00.00.00.00 vlan943   RSERVER    -       * 3 req     dn
7.0.0.1         00.0b.fc.fe.1b.09 vlan943   NAT        LOCAL     _         up
- 7.0.0.3
The problem is that we see the problem only on the secondary loadbalancer. primary is just running file
also i can see some traffic denial in admin context for resource usage
switch/Admin# sh resource usage
                                                     Allocation
        Resource         Current       Peak        Min        Max       Denied
Context: Admin
conc-connections              9          9     160000    6560000          0
mgmt-connections              0         46       2000      82000          0
proxy-connections             0          4      20972     859830          0
xlates                        0          0      20972     859830          0
bandwidth                     0   17715713   10000000 535000000    5799749
    throughput                  0   17710993   10000000 410000000    5799749
    mgmt-traffic rate           0       4720          0 125000000          0
connection rate               0         43      20000     820000          0
ssl-connections rate          0          0        100       4100          0
mac-miss rate                 0          1         40       1640          0
inspect-conn rate             0          0        120       4920          0
acl-memory                56336      56336    1570072   64460552          6
sticky                        0          0      83886          0          0
regexp                        0          0      20972     859832          0
syslog buffer             82944      82944      82944    3447808          0
syslog rate                   0         44       2000      82000         25
Context: INTEGRATION_Context
conc-connections              0       3934     160000          0          0
mgmt-connections              0         98       2000          0          0
proxy-connections             0         33      20972          0          0
xlates                        0          0      20972          0          0
bandwidth                     0   10019910   10000000 125000000      40857
    throughput                  0   10000000   10000000          0      40857
    mgmt-traffic rate           0      19910          0 125000000          0
connection rate               0         49      20000          0          0
ssl-connections rate          0          0        100          0          0
mac-miss rate                 0         32         40          0          0
inspect-conn rate             0         58        120          0          0
acl-memory                11920      11920    1570072          0          0
sticky                        0          1      83886          0          0
regexp                        0          0      20972          0          0
syslog buffer                 0      82944      82944    3447808          0
syslog rate                   0        312       2000          0          0
these above 2 contexts are the only one which has bandwidth resource usage exceeding the limit. but i somehow am not sure if this is the issue. as there is just no traffic on the secondary .. then how can the bandwidth reach the threshold? can anyone throw some light on the below issue?
thanks and regards
kiran

vlan on Standby_ACE switch
svclc multiple-vlan-interfaces
svclc module 1 vlan-group 1,4,12,13,
svclc vlan-group 1 968
svclc vlan-group 12 132
svclc vlan-group 13 367-372,374,375,379,380,538,805,807,808,818,913,915
svclc vlan-group 13 917-920,922-924,933,934,937,938,942-949,972,976-979,983
svclc vlan-group 13 984
ip subnet-zero
no ip source-route
vlans on standby ACE
switch/Admin# sh vlans
Vlans configured on SUP for this module
vlan132 vlan360 vlan367-375 vlan379-380 vlan538 vlan805 vlan807-808 vlan818 vlan913 vlan91
5 vlan917-920 vlan922-924 vlan930 vlan933-934 vlan937-938 vlan942-949 vlan968 vlan971-972 v
lan976-979 vlan983-984
switch/Admin#
Active_LB_host_switch is the switch hosting the active ACE thats connected on ten7/4 and 8/4 which is bundeled and made into
port-channel (po72)
CDP neighbor hosting the active ACE
Active_LB_host_switch
                 Ten 7/4           148          R S I     WS-C6513 Ten 7/4
Active_LB_host_switch
                 Ten 8/4           156          R S I     WS-C6513 Ten 8/4
Po72 allows all the vlans which is the configured for ACE modules.
Port                Vlans allowed on trunk
Po72                132,140,181,359-383,538,668,702,805-808,815-816,818-820,836,907,909-920,922-925,
            929-935,937-949,967-973,976-984,987,3212
vlan 968 is the FT vlan and the same hass been allowed on the trunk port.
everything looks good to me but still not sure why isnt the ACE module not coming to the network. it was working fine
a few months back but all of a sudden it lost the network connectivity. i am not even able to ping the physical ip of the
ACE module.
thanks and regards
kiran

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Itunes wont move your music for you, get iTune sgoing then ask again.

My itunes account shuts down for no reason. It wont recognize my iphone and there is an issue with network connectivity and itunes. I have already reinstalled itunes and did a syste restore on my computer, firewall checked and virus scan done. Ideas??

My itunes account on windows xp shuts down for no reason. If even try to delete something from my library it shuts down. It wont recognize my iphone and there is an issue with network connectivity and I can't connect to the store. I have already reinstalled itunes and did a system restore on my computer, firewall has been checked, itunes is ok on firewall and virus scan done. Ideas??

Same problem. I can see the itunes store so not a problem with windows firewall. The account is active on my iphone so i know i am not locked out. I can connect the PC to my iphone so i know itunes is working ok. It is just logging into itunes on this pc which doesn't work. Only thing I can think of is that the email address I use for my apple id has been offline for a while and is working again now, I'm wondering whether this has been the case for others who are having this issue?

I've been having an issue of connecting to wifi. I have restored and set up my phone as a new one and i still can't connect. Also i have restored my network setting also. The wifi button is still grey and i cant switch it on or off.

I've been having an issue of connecting to wifi. I have restored and set up my phone as a new one and i still can't connect. Also i have restored my network setting also. The wifi button is still grey and i cant switch it on or off.

Hi _Pchay,
Accordign to the artcle below, it looks like you have done all the troubleshooting steps and your next step may be to contact Apple Support.
iOS: Wi-Fi settings grayed out or dim
-Griff W.

I am trying to download an update for my iphone, but in the middle of the download I get an error message that says, 'There was a problem downloading the software for iphone. The network connection timed out.' Any ideas on how to resolve this issue?

I am trying to download an update to my iphone, but in the middle of the download, I get an error message that reads, 'There was problem downloading the software for the iphone. The network connection timed out'. Any idea how to reslove this issue?

Hi Robertfrom Denver.
Did you try the solution given, and if yes, did it work?
I have done several "attempted downloads, and see the full file download, typically taking 30 minutes to complete, and then something goes wrong.
I am happy to suspend AV and FW software, but would like to know if it is a good fix or not first?
HelenfromBroughton Astley

[SOLVED] Network connection issues - need to make connections twice

I've a strange issue with my network connection that has recently started to appear where if I:
- Attempt to install a package with pacman.
- Visit a webpage in chromium.
- FTP a file using Thunar.
- SSH into a server.
Then I quite often have to attempt the connection twice i.e:
- Pacman will return "error: failed retrieving file" on a first attempt, but be fine on the second.
- Chromium (or any other browser) will partially load pages or will show a 'Server Not Found' message on the first attempt but be OK after a refresh.
- FTP will not resolve the server on the first attempt but will on the second.
- ssh will return "Could not resolve hostname Name or service not known" on the first attempt then be fine on the second.
This issue just used to occur with pacman & ssh and I just put it down to 'one of those things I needed to fix when I had time'. Yet the issue has recently started occuring with chromium as well so is making browsing the web a real pain.
I'm at a bit of a loss as to how to track down the issue so would appreciate any tips!
I'm using netctl to connect over wifi & just as I tried to post this message an error appeared in Chromium which may give me some hints as to how to fix this:
The server at bbs.archlinux.org can't be found because the DNS look-up failed. DNS is the network service that translates a website's name to its Internet address. This error is most often caused by having no connection to the Internet or a misconfigured network. It can also be caused by an unresponsive DNS server or a firewall preventing Chromium from accessing the network.
I'm using netcl to connect over wifi.
I also recently installed dhcpd which I occasionally start and stop though the issue with pacman & ssh was occurring before this.
Thanks
Tom
Last edited by anthillsocial (2013-10-14 10:28:48)

Thanks for that Strike0. It prompted a thorough reading of a number of man pages, though while I 'think' I understand the general concept of how things should be working, I'm finding the configuration confusing!!
I created and added some nameserver settings to the following config file '/etc/resolv.conf.head' (googles 8.8.8.8 and 8.8.4.4 also work):
$ vim /etc/resolv.conf.head
# OpenDNS servers
nameserver 208.67.222.222
nameserver 208.67.220.220
Then I reload /etc/resolv.conf and view its new content:
$ resolvconf -u;cat /etc/resolv.conf
# Generated by resolvconf
# OpenDNS servers
nameserver 208.67.222.222
nameserver 208.67.220.220
domain home
nameserver 192.168.1.254
And this seems to make everything work, where network connection are being reached after the first attempt!!
Though I'm confused why 192.168.1.254 is being used? Am I right in understanding that 192.168.1.254 is a broadcast address so all network devices on 192.168.1.* are being queried for a DNS server? If I use the host command on 192.168.1.254 it seems to fail. Does this fail mean that my home router is not working correctly or theres' an internal config issue?
$ host www.archlinux.org 192.168.1.254
Using domain server:
Name: 192.168.1.254
Address: 192.168.1.254#53
Aliases:
www.archlinux.org is an alias for gudrun.archlinux.org.
gudrun.archlinux.org has address 66.211.214.131
Host gudrun.archlinux.org.home not found: 2(SERVFAIL)
What does the "Host gudrun.archlinux.org.home not found: 2(SERVFAIL)" output mean? Where is it getting the .home name from?
As comparison
$ host www.archlinux.org 8.8.4.4
Using domain server:
Name: 8.8.4.4
Address: 8.8.4.4#53
Aliases:
www.archlinux.org is an alias for gudrun.archlinux.org.
gudrun.archlinux.org has address 66.211.214.131
In one of the man pages I saw that you can test an internal DNS with:
$ host www.archlinux.org 127.0.0.1
;; connection timed out; no servers could be reached
Though wouldn't a dhcpd4.service need to be running for that to work?
Lots of questions I know, but I would like to understand exactly what's happening so I can easily trouble shoot in the future.
Tom
Last edited by anthillsocial (2013-10-11 13:55:30)

Standby cisco ACE loadbalancer issues (network connectivity)

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