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
Last Comment
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.
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