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fluce
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Routing between Service Module and interal ports

I have a Cisco 3925 that contains a SM-ES3G-24-P 24 port switch module, along with an HWIC. We have connected to it through the CLI where is looks to be a self contained switch module running a 3560 image on it's own. The question becomes how to get internal ports to connect and route to ports on the switch module without hard cabling?
RoutersSwitches / Hubs

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fluce

8/22/2022 - Mon
Justin Ellenbecker

When you are logged into the Switch module can you ping one of hte routers interfaces?  I know in the current models with switch wics in them yo don't have to do anything its acts as a layer three switch and it knows where the traffic goes because the networks are connected to the device  But if it seems to be running its own IOS it is going to need a route somewhere, does it have a separate routing table?
Justin Ellenbecker

Can you post a "show IP route" from each device please.
Justin Ellenbecker

Also according to this guide they will connect through the backplan and there should be no other extra configuration steps needed to get them talking to each other.

http://www.cisco.com/en/US/docs/routers/access/interfaces/nm/hardware/installation/guide/eesm_hw.html
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fluce

ASKER
I would agree with StrifeJester but the connect only cross connects two devices according to the documentation so I am at an impasse there.

The "switch" has not routing table however the port assigned to the service module "G2/0" has an address of 192.168.254.254/24, and the show ip route on the router is below.

yourname#sh ip route
Codes: L - local, 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, + - replicated route

Gateway of last resort is not set

      10.0.0.0/8 is variably subnetted, 12 subnets, 2 masks
C        10.0.1.0/29 is directly connected, Serial0/0/0:0.201
L        10.0.1.1/32 is directly connected, Serial0/0/0:0.201
C        10.0.1.8/29 is directly connected, Serial0/0/0:0.202
L        10.0.1.9/32 is directly connected, Serial0/0/0:0.202
C        10.0.1.16/29 is directly connected, Serial0/0/0:0.203
L        10.0.1.17/32 is directly connected, Serial0/0/0:0.203
C        10.0.2.0/29 is directly connected, Serial0/0/0:0.205
L        10.0.2.1/32 is directly connected, Serial0/0/0:0.205
C        10.0.2.8/29 is directly connected, Serial0/0/0:0.206
L        10.0.2.9/32 is directly connected, Serial0/0/0:0.206
C        10.0.2.16/29 is directly connected, Serial0/0/0:0.207
L        10.0.2.17/32 is directly connected, Serial0/0/0:0.207
      172.16.0.0/29 is subnetted, 6 subnets
S        172.16.1.0 [1/0] via 10.0.1.6
S        172.16.1.8 [1/0] via 10.0.1.14
S        172.16.1.16 [1/0] via 10.0.1.22
S        172.16.2.0 [1/0] via 10.0.2.6
S        172.16.2.8 [1/0] via 10.0.2.14
S        172.16.2.16 [1/0] via 10.0.2.22
      192.168.1.0/24 is variably subnetted, 2 subnets, 2 masks
C        192.168.1.0/24 is directly connected, GigabitEthernet0/1
L        192.168.1.247/32 is directly connected, GigabitEthernet0/1
      192.168.15.0/24 is variably subnetted, 2 subnets, 2 masks
C        192.168.15.0/24 is directly connected, GigabitEthernet0/0
L        192.168.15.1/32 is directly connected, GigabitEthernet0/0
      192.168.254.0/24 is variably subnetted, 2 subnets, 2 masks
C        192.168.254.0/24 is directly connected, GigabitEthernet2/0
L        192.168.254.254/32 is directly connected, GigabitEthernet2/0

I find that I cannot ping the 192.168.254.254/24 interface when I am working in the switch (no route?) but I can ping that interface when I am back in the router.
Justin Ellenbecker

OK, now when you are in the switch does it list an extra interface that is not really there to plug anything into.  If i am right there should be 23 FA and 1 Gi on that switch module, if you do a show int status does it list more than that?  I am thinking there is an adapter similar to a gbic that is being routed internally on the router.  G2/0 on the router is not a physical port correct?  Possibly just adding a default route in the switch with the next hop as 192.168.254.254 to resolve the inter device routing.  I am thinking from what i have read on the 3900 that it is handled this way and there is for lack of a better term an invisible trunk between them already.  If this is the case you may also be able to change gi2/0 to be an ip on the same vlan as the switch and eliminate a route.  Can you post the show int status from the router and the switch please.
fluce

ASKER
There seems to be as both port 25 and 26 on the switch would be extra on a 24 port switch, and G2/0 seems to be the module on the router side.

Here is the routers show int stat:

r1n3925#sh int stat
GigabitEthernet0/0
          Switching path    Pkts In   Chars In   Pkts Out  Chars Out
               Processor     163011   77382863      21039    2340718
             Route cache    2342045  178423718    3404833  256004562
                   Total    2505056  255806581    3425872  258345280
GigabitEthernet0/1
          Switching path    Pkts In   Chars In   Pkts Out  Chars Out
               Processor     141639    9930189      16367    1414509
             Route cache          0          0          0          0
                   Total     141639    9930189      16367    1414509
GigabitEthernet0/2
          Switching path    Pkts In   Chars In   Pkts Out  Chars Out
               Processor     632084   42884617      17907    1992265
             Route cache      34029    4074108          0          0
                   Total     666113   46958725      17907    1992265
Serial0/0/0:0
          Switching path    Pkts In   Chars In   Pkts Out  Chars Out
               Processor      17776     337754      35562    7435912
             Route cache    3404833  221956232    2342045  153294894
                   Total    3422609  222293986    2377607  160730806
GigabitEthernet2/0
          Switching path    Pkts In   Chars In   Pkts Out  Chars Out
               Processor       2057     137744        278     108628
             Route cache          0          0          0          0
                   Total       2057     137744        278     108628


And the switches sh int stat

s1n3925#sh int stat
Vlan1
          Switching path    Pkts In   Chars In   Pkts Out  Chars Out
               Processor          0          0          0          0
             Route cache          0          0          0          0
                   Total          0          0          0          0
Vlan101
          Switching path    Pkts In   Chars In   Pkts Out  Chars Out
               Processor          0          0          7        448
             Route cache          0          0          0          0
                   Total          0          0          7        448
Vlan102
          Switching path    Pkts In   Chars In   Pkts Out  Chars Out
               Processor          0          0          7        448
             Route cache          0          0          0          0
                   Total          0          0          7        448
Vlan103
          Switching path    Pkts In   Chars In   Pkts Out  Chars Out
               Processor          0          0          7        448
             Route cache          0          0          0          0
                   Total          0          0          7        448
GigabitEthernet0/1
          Switching path    Pkts In   Chars In   Pkts Out  Chars Out
               Processor          0          0        113      12283
             Route cache          0          0          0          0
                   Total          0          0        113      12283
Interface GigabitEthernet0/2 is disabled

Interface GigabitEthernet0/3 is disabled

Interface GigabitEthernet0/4 is disabled

Interface GigabitEthernet0/5 is disabled

Interface GigabitEthernet0/6 is disabled

Interface GigabitEthernet0/7 is disabled

Interface GigabitEthernet0/8 is disabled

Interface GigabitEthernet0/9 is disabled

Interface GigabitEthernet0/10 is disabled

Interface GigabitEthernet0/11 is disabled

Interface GigabitEthernet0/12 is disabled
         
Interface GigabitEthernet0/13 is disabled

Interface GigabitEthernet0/14 is disabled

Interface GigabitEthernet0/15 is disabled

Interface GigabitEthernet0/16 is disabled

Interface GigabitEthernet0/17 is disabled

Interface GigabitEthernet0/18 is disabled

Interface GigabitEthernet0/19 is disabled

Interface GigabitEthernet0/20 is disabled

Interface GigabitEthernet0/21 is disabled

Interface GigabitEthernet0/22 is disabled

Interface GigabitEthernet0/23 is disabled

Interface GigabitEthernet0/24 is disabled

GigabitEthernet0/25
          Switching path    Pkts In   Chars In   Pkts Out  Chars Out
               Processor          0          0          0          0
             Route cache          0          0          0          0
                   Total          0          0          0          0
GigabitEthernet0/26
          Switching path    Pkts In   Chars In   Pkts Out  Chars Out
               Processor          6        869         82      11530
             Route cache          0          0          0          0
                   Total          6        869         82      11530
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fluce

ASKER
One more thing. There is a desire to run three vlans across to port 1 on the switch so they can be trunked and sent to a remote site.
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fluce

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