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ios advice before purchase

hi I currently have the following:

cisco 2950 layer 2 -
 
c2950-i6q4l2-mz.121-19.EA1c.bin - currently installed
c2950-i6k2l2q4-mz.121-22.EA4.bin

cisco 3550 layer 3 -

c3550-i5q3l2-mz.121-22.EA2.bin - currently installed
c3550-ipbase-mz.122-25.SEB4.bin

question 1.  ive also seen: ipservices ios type also and I assume there are others but not sure if 'emi' has more features ?

question 2.  I know that 'smi' is for layer 2 but not sure if that is what my above cisco 2950 is currently using ?

question 3.  I know that 'emi' is for layer 3 but not sure if that is what my above cisco 3550 is currently using  ?
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mikey250
Asked:
mikey250
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10 Solutions
 
Don JohnstonInstructorCommented:
SI and EI 2950 switches are hardware defined. You can't upgrade with an IOS image.
SI's can have 64 VLANs, and PVST.
EI's can have 250 VLANs, Rapid-PVST, 802.1s, and PACLs.

3550's can be upgraded from SMI to EMI by running a different IOS image.
SMI's supoort RIP.
EMI's support IGRP, EIGRP, OSPF, BGP, HSRP and PBR.

But if you have an SMI switch, you will not be able to download the EMI code unless you have an EMI switch under smartnet or you pay for the EMI license.
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Garry GlendownConsulting and Network/Security SpecialistCommented:
Also, not really an answer to your question, please note that both devices are EOL (last service date for 2950 was October 2013, 3550 was May 2011) - before spending money on a very outdated switch which might die any time, check whether it might be a good time to replace them by something new that has all the features you require, decent performance and reliability for 5+ years (plus most switches from Cisco in this range come with a limited lifetime waranty) ... check into 2960X and 2960XR range (the latter has routing capability), they are priced relatively well ...
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mikey250Author Commented:
hi, in this situation I am only setting up a test network 1st.
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mikey250Author Commented:
hi don,

question 1.  what is an 'si & an ei' I assume 'smi & emi'  ?
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Don JohnstonInstructorCommented:
In this context, "M" stands for "Multilayer".  Since the 2950 is a layer 2 switch, there is no multilayer. So it's "Standard Image" and "Enhanced Image".
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mikey250Author Commented:
hi don,  thanks for that.

question 1.  ive just checked my 3 x cisco 2950 using the same ios and curious as to why the below vlans are different  ?

- 2950 64 vlans
- 2950 64 vlans
- 2950 250 vlans

question 2.  how do I check to know what my cisco 3550 is ie an emi  ?
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Don JohnstonInstructorCommented:
The first two are probably si and the third is an ei.

IIRC, a "show version" should display whether it's an si or ei.
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mikey250Author Commented:
yes I have done: sh version but I cannot see: iirc
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Don JohnstonInstructorCommented:
Please post the output of a "show version".
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mikey250Author Commented:
hi don, apologies for not getting back asap.

- I have attached individual screenshots of sh version -  3 x 2950 switches which allow 2 2950 for 64 vlans & 1 with 250 vlans allowed

- I have attached the 1 x 3500 sh version also
2950---3550-sh-version-screenshot.docx
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Don JohnstonInstructorCommented:
2950.jpgIt's an EI.
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mikey250Author Commented:
hi don,

q1. ok I can see the 1st primary 2950 has 'ei' but the secondary or access does not  ?

q2. also the 3550 does not show anything either  ?
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Don JohnstonInstructorCommented:
On the 2950, if it doesn't say "EI", then it's an "SI".

On the 3550, you have to look at the IOS image.  Images that start with "c3550-i5" are EMI and "c3550-i9" are SMI. So yours is an EMI.
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mikey250Author Commented:
my cisco 2950 does not allow any of the below with current ios: - (expected)

 - vlan access-maps
 - sso & nsf for eigrp & ospf or either
 - switchport autostate exclude
 - multicasting routing
 - ssh 1024 or higher

I attempted to check the below configurations on the below but not all work  ?

 cisco 3550:

 - vlan access-maps - allowed
 - sso & nsf for eigrp & ospf - not features
 - switchport autostate exclude - no features
 - multicating-routing - allowed
 - ssh 1024 or higher - no features
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Don JohnstonInstructorCommented:
I can't explain that.  The only thing I can think of is that someone renamed the IOS file so that it looks like an EMI image.

Here's the release notes for the 3550 which shows the filenames for EMI or SMI images

This document also explains the naming conventions and features.
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mikey250Author Commented:
I was going to purchase a specific cheap emi 3550 from ebay but phone to confirm so that I can at least check practical config I need to do.

q1.  what you think as I also wish to configure: 2 x 3550 & 2 x 2950 in sso/cef & eigrp or ospf for example to understand practically how 'fib & adj' functions practically in cef, although yes I can read and understand but want to see the fault tolerance being carried out  ?

...just like I can see with my 'vtp server (primary & secondary) connected to an 'access switch'which I have already tested
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Don JohnstonInstructorCommented:
I looked that image up on the feature navigator and it's showing as a valid EMI image.  But the response you're getting from trying to enable EIGRP and OSPF would indicate that its not an EMI image.

You did enable IP routing, right?  Because if that's not enabled, you can't run routing protocols.  If you don't see "ip routing" in the config, then it's not running.
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mikey250Author Commented:
config t

ip routing - successful

redundancy - not in list
mode sso - not in list

exit

router eigrp 20 - successful
nsf - not in list
redundancy - not in list

config t

vlan access-map - allowed

config t
ip domain xxx.co.uk
crypto key generate rsa - no features
line vty 0 4
login  -  local only - no features
transport input (all | none | telnet)

config t

int fa0/1
switchport - autostate exlude - no features

config t
ip multicast-routing - successful
I
nt vlan 1
ip pim sparse-mode - successful

int vlan 10
ip pim sparse-mode - successful
ip pim (rp_address x.x.x.x) -command in brakets () does not have feature
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Don JohnstonInstructorCommented:
Okay. Looks like you didn't have ip routing enabled.

Not sure why you're using sso and redundancy commands. This isn't a modular, dual supervisor platform.
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mikey250Author Commented:
yes I did the configs shown are show what features were not available is what I mean
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mikey250Author Commented:
oh yeh you are right I am not using a 6500 for eg
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mikey250Author Commented:
int vlan 10
 ip pim sparse-mode - successful
 ip pim (rp_address x.x.x.x) -command in brakets () does not have feature

config t

 int fa0/1
 switchport - autostate exlude - unsuccessful no features


config t
 ip domain xxx.co.uk - successful
 crypto key generate rsa - unsuccessful no features
exit
1024 or 2048 - unsuccessful
ip ssh version 2 - no features

line vty 0 4
local - successful but no 'authentication login'
transport input (all | none | telnet) - not sure what to choose as no 'ssh'
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Don JohnstonInstructorCommented:
Have you enabled PIM on any interfaces? I don't know if you can define an RP if PIM isn't running.

Autostate is on by default and can't be disabled.

Please post the current config of the switch.
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mikey250Author Commented:
hi don, is it ok if I return to this question tomorrow!

I have not enable 'pim' on an interface as did not know.  I will check.

if I wish to 'exclude autostate' - I assume this be allowed if required on another switch or different ios.
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Don JohnstonInstructorCommented:
IIRC, autostate can not be disabled on any IOS switch.  Why do you want to disable it?
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mikey250Author Commented:
hi don, I don't I just read it somewhere and wrote it down for future query.
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Don JohnstonInstructorCommented:
Okay...
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mikey250Author Commented:
sound advice.  much appreciated.
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