3750 Maximum HSRP instance limitation?

I worked on a small project recently where we used a pair of 3750-12S (running the IP Services image) as a collapsed distribution/core layer with 2960's and 2950's for the access layer. In total we had 11 access-layer switches each connected to each 3750 over dot1q GigE links, each switch with 4 VLAN's, these VLANs were terminated on the 3750's.
The intention was to use HSRP on each VLAN but we hit this limitation on the 3750 where we could only have a maximum of 32 HSRP instances. When I attempted to add the 33rd HSRP instance an error message was logged stating something like 'platform only supports 32 HSRP groups'. Since we used the same HSRP Group ID (standby 1) I thought we wouldn't hit this issue.
Are there any workarounds or is this just a platform limitation with the 3750? We were running 12.2(25)SED1, I had a look in the 12.2(25)SEE release notes and didn't see anything related to HSRP being added.
Thanks
Andy

The wording in the documentation is a little vague and this is why I assumed this was the same limitation you have with HSRP on the 6500 Sup2/MSFC2. This is where you are limited to 16 unique HSRP groups due to the number of MAC's available. You can get around this by re-using the same HSRP group number on each interface.
The vague bit of documentation was:
If HSRP is enabled, the switch can recognize 32 additional MAC addresses, each associated with a set of VLANs or routing interfaces.
I agree once I looked at some other documentation I saw:
HSRP can be configured on a maximum of 32 VLAN or routing interfaces
I was slightly dissapointed that the 3550 does not have this limitation since the 3750 is supposed to be the logical upgrade path and with its stacking capability it can easily be placed in the distribution layer terminating lots of VLAN's.
The customer does not have the cash to install catalyst 4500's since the difference in price is just too much.
Thanks for the replies.
Andy

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04-12-2000 16:24:01 0 idev `Intermaker` 679 10 0x400fff `Completing processing of Intermaker Option # 1`
04-12-2000 16:24:01 0 idev `Intermaker` 679 10 0x400fff `Completing Intermaker.doGet`
04-12-2000 16:24:01 0 idev `JAVAWEB` 679 7 0x400fff `Notify class name: oracle.OAS.servlet.servletrunner, dir path: D:\Oracle\Intermaker\servlets
04-12-2000 16:24:01 0 idev `JAVAWEB` 679 7 0x400fff `cartridge: IntermakerS/IntermakerS bytes written: 0 process time: 2
04-12-2000 16:24:01 0 idev `JAVAWEB` 679 7 0x400fff `DecAttachCount before: 1, after: 0, threadId: 7
04-12-2000 16:24:01 0 idev `JAVAWEB` 679 7 0x400fff `Set AttachCount to: 0, threadId: 7
04-12-2000 16:24:01 0 idev `JAVAWEB` 679 7 0x400fff `Set AttachCount memory freed and set to null, threadId: 7
04-12-2000 16:24:01 0 idev `JAVAWEB` 679 7 0x400fff `Processing request complete. thr_id: 7
04-12-2000 16:24:47 0 idev `JAVAWEB` 679 7 0x400fff `Java cartridge instance exec..., thr_id: 8
04-12-2000 16:24:47 0 idev `JAVAWEB` 679 7 0x400fff `IncAttachCount before: 0, after: 1, threadId: 8
04-12-2000 16:24:47 0 idev `JAVAWEB` 679 7 0x400fff `Set AttachCount to: 1, threadId: 8
04-12-2000 16:24:47 0 idev `JAVAWEB` 679 10 0x400fff `Processing request: 0
04-12-2000 16:24:47 0 idev `Intermaker` 679 10 0x400fff `Starting Intermaker.doGet`
04-12-2000 16:24:47 0 idev `Intermaker` 679 10 0x400fff `Starting processing of Intermaker Option # 3`
04-12-2000 16:24:47 0 idev `Intermaker` 679 10 0x400fff `Completing processing of Intermaker Option # 3`
04-12-2000 16:24:47 0 idev `Intermaker` 679 10 0x400fff `Completing Intermaker.doGet`
04-12-2000 16:24:47 0 idev `JAVAWEB` 679 7 0x400fff `Notify class name: oracle.OAS.servlet.servletrunner, dir path: D:\Oracle\Intermaker\servlets
04-12-2000 16:24:47 0 idev `JAVAWEB` 679 7 0x400fff `cartridge: IntermakerS/IntermakerS bytes written: 0 process time: 0
04-12-2000 16:24:47 0 idev `JAVAWEB` 679 7 0x400fff `DecAttachCount before: 1, after: 0, threadId: 8
04-12-2000 16:24:47 0 idev `JAVAWEB` 679 7 0x400fff `Set AttachCount to: 0, threadId: 8
04-12-2000 16:24:47 0 idev `JAVAWEB` 679 7 0x400fff `Set AttachCount memory freed and set to null, threadId: 8
04-12-2000 16:24:47 0 idev `JAVAWEB` 679 7 0x400fff `Processing request complete. thr_id: 8
04-12-2000 16:24:47 0 idev `JAVAWEB` 679 7 0x400fff `Java cartridge instance exec..., thr_id: 7
04-12-2000 16:24:47 0 idev `JAVAWEB` 679 7 0x400fff `IncAttachCount before: 0, after: 1, threadId: 7
04-12-2000 16:24:47 0 idev `JAVAWEB` 679 7 0x400fff `Set AttachCount to: 1, threadId: 7
04-12-2000 16:24:47 0 idev `JAVAWEB` 679 10 0x400fff `Processing request: 0
04-12-2000 16:24:47 0 idev `Intermaker` 679 10 0x400fff `Starting Intermaker.doGet`
04-12-2000 16:24:47 0 idev `Intermaker` 679 10 0x400fff `Starting processing of Intermaker Option # 2`
04-12-2000 16:24:50 0 idev `Intermaker` 679 10 0x400fff `Completing processing of Intermaker Option # 2`
04-12-2000 16:24:50 0 idev `Intermaker` 679 10 0x400fff `Completing Intermaker.doGet`
04-12-2000 16:24:50 0 idev `JAVAWEB` 679 7 0x400fff `Notify class name: oracle.OAS.servlet.servletrunner, dir path: D:\Oracle\Intermaker\servlets
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04-12-2000 16:24:50 0 idev `JAVAWEB` 679 7 0x400fff `DecAttachCount before: 1, after: 0, threadId: 7
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04-12-2000 16:24:50 0 idev `JAVAWEB` 679 7 0x400fff `Set AttachCount memory freed and set to null, threadId: 7
04-12-2000 16:24:50 0 idev `JAVAWEB` 679 7 0x400fff `Processing request complete. thr_id: 7
04-12-2000 16:25:33 0 idev `JAVAWEB` 679 7 0x400fff `Java cartridge instance exec..., thr_id: 8
04-12-2000 16:25:33 0 idev `JAVAWEB` 679 7 0x400fff `IncAttachCount before: 0, after: 1, threadId: 8
04-12-2000 16:25:33 0 idev `JAVAWEB` 679 7 0x400fff `Set AttachCount to: 1, threadId: 8
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04-12-2000 16:25:33 0 idev `JAVAWEB` 679 7 0x400fff `cartridge: IntermakerS/IntermakerS bytes written: 0 process time: 0
04-12-2000 16:25:33 0 idev `JAVAWEB` 679 7 0x400fff `DecAttachCount before: 1, after: 0, threadId: 8
04-12-2000 16:25:33 0 idev `JAVAWEB` 679 7 0x400fff `Set AttachCount to: 0, threadId: 8
04-12-2000 16:25:33 0 idev `JAVAWEB` 679 7 0x400fff `Set AttachCount memory freed and set to null, threadId: 8
04-12-2000 16:25:33 0 idev `JAVAWEB` 679 7 0x400fff `Processing request complete. thr_id: 8
null

Ven Kumar (guest) wrote:
: Hi guys.
: Iam running OAS 4.0.7 on WIndows NT with SP4. When I invoke a
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ios
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: Thanks
: Ven
OAS 4.0.7 on NT with SP4 need it 128 Mb. RAM. Do you have it
If not, Oops .... the performance is terrible ....
I sure, I have the same environment ....
Bye ....
null

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Artur -- max-instances-per-pk controls the size of the pool of wrapper instances for OC4J. I would just set it to a very large
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book. Also, the cache will be able to be disabled but that function was not in the pre-release. Lastly, we should be
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The wrapper instance is OC4J-generated wrapper code that provides for the
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<entity-deployment ... max-instances-per-pk="20"
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Set the minimum wrapper instances as follows:
<entity-deployment ... min-instances-per-pk="2"
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Thanks -- Jeff

3750 Maximum HSRP instance limitation?

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