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Another HP Switch/Cisco Router Question

Let's call the two HPs Switch A and Switch B to be creative.

I have a Cisco 2600 router that I have limited access to (the lowest) so I can't see a lot of info, but our Central tech support configured it like this:
**************************
interface Ethernet0/0
 ip address 10.65.44.1 255.255.255.0
 ip helper-address 10.1.1.21
 ip helper-address 10.2.1.22
 ip tcp adjust-mss 1350
 half-duplex
 no cdp enable
!
 interface Ethernet0/1
 description Management
 no ip address
 ip helper-address 10.1.1.21
 ip helper-address 10.2.1.22
 ip tcp adjust-mss 1350
 load-interval 30
 full-duplex
 no snmp trap link-status
 no cdp enable
!
interface Ethernet0/1.1
 description Management
 encapsulation dot1Q 1 native
 ip address 10.65.45.1 255.255.255.192
 ip helper-address 10.1.1.21
 ip helper-address 10.2.1.22
 no cdp enable
!
interface Ethernet0/1.2
 description SERVERS
 encapsulation dot1Q 2
 ip address 10.65.45.65 255.255.255.192
 ip helper-address 10.1.1.21
 ip helper-address 10.2.1.22
 no cdp enable
!
interface Ethernet0/1.3
 description PC
 encapsulation dot1Q 3
 ip address 10.65.45.129 255.255.255.128
 ip helper-address 10.1.1.21
 ip helper-address 10.2.1.22
 no cdp enable
!
interface Ethernet0/1.4
 description SCALES
 encapsulation dot1Q 4
 ip address 10.65.46.1 255.255.255.192
 ip helper-address 10.1.1.21
 ip helper-address 10.2.1.22
 no cdp enable
**********************************
and so on and so forth for a total of 13 VLANs. I have Switch A attached to the Ethernet0/1 int on port 25. It's config is:
*******************************
vlan 1
   name "Management"
   untagged 17-24
   ip address 10.65.45.3 255.255.255.192
   tagged 25-26
   no untagged 1-16
   exit
vlan 12
   name "POS"
   untagged 1-16
   tagged 25-26
   exit
vlan 2
   name "Servers"
   tagged 25-26
   exit
vlan 3
   name "Wireless-PC"
   tagged 25-26
 exit
vlan 4
   name "Scales"
   tagged 25-26
   exit

etc. Switch B is attached to Switch A on port 26. It's config is:
**********************************
vlan 1
   name "Management"
   untagged 17-24
   ip address 10.65.45.2 255.255.255.192
   tagged 1-16,25-26
   exit
vlan 2
   name "Servers"
   tagged 25-26
   exit
vlan 3
   name "Wireless-PC"
   tagged 25-26
   exit
vlan 4
   name "Scales"
   tagged 25-26
   exit
*************************************

Switch A communicates fine. Its devices can communicate across the WAN, gets time from the SNTP server, everything's great. Switch B on the other hand can only communicate with Switch A. No other traffic can get through. I can't ping the router from that switch and the router can't ping me. I attach a client to that switch and it too can ping the other switch just fine, but not the router and vice versa. HP says my config is fine. I wonder if any Cisco/HP experts out there see anything that needs to be tweaked in either config? Maybe some little thing that is a known issue between this model Cisco and HP? I'm at the end of my rope.

Thanks in advance, and I'll provide whatever further info I can.
0
sorcoit
Asked:
sorcoit
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2 Solutions
 
Jim_CoyneCommented:
Switch A and the router are communicating via dot1q (trunking)

Are the switches also trunking?

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Jim_CoyneCommented:
I think we need to see the configs of switch A's port 25 and 26

and also a sh trunk
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jburgaardCommented:
Just to be sure is the setup like:
Cisco2600 eth0/1 <-> A/25
A/26<->B/25 (connected ports tagged same way on both switches) ??
B17<->PC (accessport untagged in relevant vlan)?
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sorcoitAuthor Commented:
Hi Jim-

The results of sh trunk are:

 Load Balancing

  Port | Name                             Type      | Group Type
  ---- + -------------------------------- --------- + ----- -----


I'm not sure how to show the configs for those ports, so here's a couple of things.
Status and Counters - Port Counters for port 25

  Name  :
  Link Status     : Up
  Totals (Since boot or last clear) :
   Bytes Rx        : 92,262,762         Bytes Tx        : 27,589,156
   Unicast Rx      : 77,794             Unicast Tx      : 57,305
   Bcast/Mcast Rx  : 762,720            Bcast/Mcast Tx  : 25,248
  Errors (Since boot or last clear) :
   FCS Rx          : 0                  Drops Rx        : 38
   Alignment Rx    : 0                  Collisions Tx   : 10
   Runts Rx        : 0                  Late Colln Tx   : 38
   Giants Rx       : 0                  Excessive Colln : 0
   Total Rx Errors : 0                  Deferred Tx     : 109
  Rates (5 minute weighted average) :
   Total Rx  (bps) : 54048              Total Tx  (bps) : 52496
   Unicast Rx (Pkts/sec) : 0            Unicast Tx (Pkts/sec) : 0
   B/Mcast Rx (Pkts/sec) : 5            B/Mcast Tx (Pkts/sec) : 0
   Utilization Rx  : 00.54 %            Utilization Tx  : 00.52 %
***************************
Status and Counters - Port Counters for port 26

  Name  :
  Link Status     : Up
  Totals (Since boot or last clear) :
   Bytes Rx        : 1,738,075          Bytes Tx        : 59,215,503
   Unicast Rx      : 6433               Unicast Tx      : 42,584
   Bcast/Mcast Rx  : 8953               Bcast/Mcast Tx  : 546,510
  Errors (Since boot or last clear) :
   FCS Rx          : 0                  Drops Rx        : 0
   Alignment Rx    : 0                  Collisions Tx   : 0
   Runts Rx        : 0                  Late Colln Tx   : 0
   Giants Rx       : 0                  Excessive Colln : 0
   Total Rx Errors : 0                  Deferred Tx     : 0
  Rates (5 minute weighted average) :
   Total Rx  (bps) : 5000800            Total Tx  (bps) : 5004344
   Unicast Rx (Pkts/sec) : 0            Unicast Tx (Pkts/sec) : 0
   B/Mcast Rx (Pkts/sec) : 0            B/Mcast Tx (Pkts/sec) : 4
   Utilization Rx  : 00.50 %            Utilization Tx  : 00.50 %
*************************************
Status and Counters- Port Status
25    100/1000T  No         Yes      Up      10FDx       MDIX  off
  26    100/1000T  No         Yes      Up      1000FDx     MDIX  off
***********************************
Port-Trunk Settings
 25    1000T     | Yes      10FDx         Disable
  26    1000T     | Yes      Auto          Disable

Does that help? Port 25 is set to 10FDx because apparently the interface on the 2600 is ethernet, not even fastethernet. HP recommended that port speed.


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jburgaardCommented:
Trunk in HP terms is unlike trunk in Cisco language.
HP-trunk=link aggregation  versus  dot1Q encapsulation of vlans (=HP term 'tagging')
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sorcoitAuthor Commented:
jburgaard:

Yes. The 2600 0/1 connects to A/25. A26 connects to B/26. 25 and 26 on Switch A are tagged across all VLANs, as are 25 and 26 on Switch B, so identical. The port a client is attached to is set for Untagged on the appropriate VLAN (provided it's the only VLAN being supported), or Tagged if it's a client moving multiple VLANs (like an AP).
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Jim_CoyneCommented:
Ok, so it sounds like the tagging (trunking in Cisco lingo) is not correct between the switches.

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jburgaardCommented:
Try make port A/25 untagged in vlan1.
As far as I remember Cisco 'like' it this way.
Between the HP's no need for change.
 
HTH
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Jim_CoyneCommented:
I am not sure how this translates to HP lingo, but the Cisco is setup with Vlan 1 as the native VLAN, so it would expect VLAN 1 to not have any modification (802.1q tags)

If VLAN 1 is "tagged" then it's not set as the native VLAN?
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jburgaardCommented:
On HP you can tag or untag vlan 1 as you like.
 In one link you can only have one untagged vlan (or none).
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sorcoitAuthor Commented:
Ultimately, the solution was that the we had to remove vlan 1 as the native vlan and make another, unused vlan the native vlan. That got everything working and allowed traffic on vlan 1 to move freely throughout all connected switches. I don't know the ends and outs of why this made it work (it was HP's suggestion), so I'm not sure if either of you were on the right track, so I just split the points because you guys were the only two to respond and you tried to help.

Thanks.
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Jim_CoyneCommented:
Thanks for the follow up with the fix (and the points).
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