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3750X-48T-S IP Base Routing

triaton
Level 1
Level 1

New to the universal IOS and having an interesting problem. I've got a new 3750X-48T-S with the universal image and what should be an IP Base key pre-installed, but I can't get L3 routing enabled. Despite having 'ip routing' enabled, showing the correct featureset in the 'Show Version' response, and having static routes defined, I don't see any routes in the routing table:

Here are some specifics:

     From 'Show Version'
License Level: ipbase
License Type: Permanent
Next reload license Level: ipbase

Switch Ports Model              SW Version            SW Image
------ ----- -----              ----------            ----------
*    1 54    WS-C3750X-48       12.2(55)SE1           C3750E-UNIVERSALK9-M

From the running configuration

ip routing

!

ip route 0.0.0.0 0.0.0.0 192.168.1.1

ip route 10.10.10.0 255.255.255.0 192.168.2.1

Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

Any ideas what I'm missing?

4 Replies 4

Richard Burts
Hall of Fame
Hall of Fame

We need additional information to be able to give a good answer. Perhaps a good place to start would be to post the output of show ip interface brief.

HTH

Rick

Sent from Cisco Technical Support iPhone App

HTH

Rick

Interface                    IP-Address      OK?   Method    Status                      Protocol
Vlan1                        unassigned     YES   NVRAM   administratively down down
Vlan4                        192.168.1.2     YES   NVRAM   up                            down
Vlan5                        192.168.2.2     YES   NVRAM   up                            down
Vlan1000                   10.10.10.1       YES   NVRAM   up                            down
FastEthernet0            unassigned      YES  manual     down                        down
GigabitEthernet1/0/1   unassigned      YES  unset       down                        down
GigabitEthernet1/0/2   unassigned      YES  unset       down                        down

     This is one of those cases where sleep may help a problem. The switch I've been working on is being prepared solo on a remote bench, with the only connection to it being the console cable. Thus no L2 interfaces are up/up, which means no VLAN interfaces are up/up, and no connected routes are added to the table. That part I understood and was in the brain. Here's what I hope is the "Aha!" moment. Static routes are normally added to the table and are not tested for state, and only removed if the connected interface is down. So, this makes me think that since I have NO interfaces in an up/up state, a static route to an address in a VLAN that is up/down would not be added to the routing table, and so the table would remain empty until at least one interface comes up...

     Can someone confirm this is my issue? I don't have a way to connect anything to this switch at the moment.

Richard Burts
Hall of Fame
Hall of Fame

Yes your understanding of the situation is correct. A static route is not added to the routing table until the interface to which it goes is in the up state. This is what I was aiming for when I requested the output of show ip interface brief.

HTH

Rick

Sent from Cisco Technical Support iPhone App

HTH

Rick

Hi Rick,

I got the same issue here.  But I have connected the PC to 3750x already and it still cannot go through.  The switch can ping to outside world but the PC cannot.  What kind of information should I post to you for troubleshoot?

Regards,

Thomas

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