I am a programmer with a small company so I also have to wear the hat of systems admin, helpdesk, and network engineer. I know enough about networking to be dangerous so if you will take the time to answer please put it in simple language as I don't speak much network
I inherited a setup with 3 T1's from one provider (multilinked) all working well, and 2 T1's from another provider where only one of the circuits has ever worked. My mission is to get the second T1 from this provider working.
Things I think might be wrong but do not know how to determine as right or wrong are the hardware differences of the modules/carriages/whatever those boards are called that the csu/dsu's plug into as well as the csu/dsu's themselves seem to be different flavors.
The All of the T's on Serial0 work, the one on Serial1 does not. Also I am not using the Ethernet interfaces on the Serial1 either.
Pasting the inventory, config, and show interface results;
#sho inv
NAME: "3845 chassis", DESCR: "3845 chassis"
PID: CISCO3845 , VID: V01 , SN: FTX1032A4RL
NAME: "c3845 Motherboard with Gigabit Ethernet on Slot 0", DESCR: "c3845 Motherb oard with Gigabit Ethernet"
PID: CISCO3845-MB , VID: V05 , SN: FOC102813RM
NAME: "WAN Interface Card - HWIC CSU/DSU on Slot 0 SubSlot 0", DESCR: "WAN Inter face Card - HWIC CSU/DSU"
PID: HWIC-1DSU-T1 , VID: V02 , SN: FOC151211ZL
NAME: "WAN Interface Card - HWIC CSU/DSU on Slot 0 SubSlot 1", DESCR: "WAN Inter face Card - HWIC CSU/DSU"
PID: HWIC-1DSU-T1 , VID: V02 , SN: FOC16024D9B
NAME: "WAN Interface Card - HWIC CSU/DSU on Slot 0 SubSlot 2", DESCR: "WAN Inter face Card - HWIC CSU/DSU"
PID: HWIC-1DSU-T1 , VID: V02 , SN: FOC15343KES
NAME: "WAN Interface Card - HWIC CSU/DSU on Slot 0 SubSlot 3", DESCR: "WAN Inter face Card - HWIC CSU/DSU"
PID: HWIC-1DSU-T1 , VID: V02 , SN: FOC152927YY
NAME: "FastEthernet/WAN on Slot 1", DESCR: "FastEthernet/WAN"
PID: NM-2FE2W= , VID: 1.0, SN: JAD061702EY
NAME: "WAN Interface Card - DSU/CSU T1 Fractional (V2) on Slot 1 SubSlot 0", DESCR: "WAN Interface Card - DSU/CSU T1 Fractional (V2)"
PID: WIC-1DSU-T1-V2 , VID: 1.1, SN: FOC09021HWJ
--------------
interface Serial0/3/0
description Sprint T1 #1 circuit xxxxxx
bandwidth 1544
no ip address
encapsulation ppp
no fair-queue
ppp multilink
ppp multilink group 2
interface Serial1/0/0
description Sprint T1 #2 circuit xxxxxx
bandwidth 1544
no ip address
encapsulation ppp
no fair-queue
ppp multilink
ppp multilink group 2
interface Multilink2
ip address xxx.xxx.xxx.xxx 255.255.255.252
ip access-group 100 in
ppp multilink
ppp multilink group 2
ppp multilink fragment disable
no cdp enable
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Serial0/3/0 is up, line protocol is up
Hardware is GT96K with integrated T1 CSU/DSU
Description: Sprint T1 #1 Ckt
MTU 1500 bytes, BW 1544 Kbit/sec, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation PPP, LCP Open, multilink Open
Link is a member of Multilink bundle Multilink2, loopback not set
Keepalive set (10 sec)
Last input 00:00:05, output 00:00:01, output hang never
Last clearing of "show interface" counters 2d20h
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
157480 packets input, 36418885 bytes, 0 no buffer
Received 0 broadcasts (0 IP multicasts)
0 runts, 0 giants, 0 throttles
4670 input errors, 4652 CRC, 1 frame, 14 overrun, 0 ignored, 3 abort
393959 packets output, 27849179 bytes, 0 underruns
0 output errors, 0 collisions, 15 interface resets
0 unknown protocol drops
0 output buffer failures, 0 output buffers swapped out
3 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up
Serial1/0/0 is down, line protocol is down
Hardware is DSCC4 with integrated T1 CSU/DSU
Description: T1 #2
MTU 1500 bytes, BW 1544 Kbit/sec, DLY 20000 usec,
reliability 253/255, txload 1/255, rxload 1/255
Encapsulation PPP, LCP Closed, loopback not set
Keepalive set (10 sec)
Last input 2d18h, output 2d18h, output hang never
Last clearing of "show interface" counters 2d20h
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
22465 packets input, 7503982 bytes, 0 no buffer
Received 0 broadcasts (0 IP multicasts)
0 runts, 3 giants, 0 throttles
11 input errors, 4 CRC, 6 frame, 0 overrun, 0 ignored, 1 abort
1867 packets output, 65014 bytes, 0 underruns
0 output errors, 0 collisions, 8288 interface resets
3 unknown protocol drops
0 output buffer failures, 0 output buffers swapped out
4 carrier transitions
DCD=down DSR=up DTR=up RTS=up CTS=down
Multilink2 is up, line protocol is up
Hardware is multilink group interface
Internet address is xxxx.xxx.xxx.xxx/30
MTU 1500 bytes, BW 1544 Kbit/sec, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation PPP, LCP Open, multilink Open
Open: IPCP, loopback not set
Keepalive set (10 sec)
DTR is pulsed for 2 seconds on reset
Last input 00:00:00, output never, output hang never
Last clearing of "show interface" counters 2d20h
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
66497 packets input, 34697205 bytes, 0 no buffer
Received 0 broadcasts (0 IP multicasts)
0 runts, 0 giants, 0 throttles
33 input errors, 0 CRC, 26 frame, 0 overrun, 0 ignored, 7 abort
344710 packets output, 27062452 bytes, 0 underruns
0 output errors, 0 collisions, 2 interface resets
0 unknown protocol drops
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
