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the feature boards (T3, T1, E1, modem, voice) in the dial shelf cannot communicate to the router shelf.
Router#show dial-shelf
Slot Board CPU DRAM I/O Memory State Elapsed
Type Util Total (free) Total (free) Time
0 CT3 0%/0% 21598976( 81%) 8388608( 41%) Up 00:01:35
2 Modem(DMM) 20%/20% 46764800( 86%) 16777216( 74%) Up 00:01:35
3 Modem(DMM) 0%/0% 46764800( 86%) 16777216( 74%) Up 00:01:35
4 Modem(DMM) 20%/20% 46764800( 86%) 16777216( 74%) Up 00:01:35
5 Modem(DMM) 20%/20% 46764800( 86%) 16777216( 74%) Up 00:01:35
6 Modem(DMM) 40%/40% 46764800( 86%) 16777216( 74%) Up 00:01:35
7 Modem(DMM) 40%/40% 46764800( 86%) 16777216( 74%) Up 00:01:35
8 Modem(DMM) 35%/35% 46764800( 86%) 16777216( 74%) Up 00:01:35
9 Modem(DMM) 0%/0% 46764800( 86%) 16777216( 74%) Up 00:01:35
10 Modem(DMM) 20%/20% 46764800( 86%) 16777216( 74%) Up 00:01:34
12 DSC 0%/0% 19097792( 79%) 8388608( 66%) Up 00:02:49
Dial shelf set for auto boot
Router#
" Possible states include: unknown, down, resetting, booting, and up. The  Up state means that the
card can communicate with the router shelf.
" Each modem board contains its own DRAM memory. Double-density modem modules (DMM)
require at least 64 MB of memory with Release 12.0. Hex modem modules (HMM) require at least
32 MB with Release 11.3. Each card performs its own call processing.
" A fully populated DMM card contains 144 modems. The dial shelf in this case study contains
1296 modems.
" A normal CPU utilization range for modem boards is between 20% to 40%.
" Always power up the dial shelf before the router shelf. Allow two to three minutes for the shelves
to boot up and send  Hello DSIP messages.
The dial and router shelves may take several minutes to boot up.
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If the DSC card does not come up, perform the following troubleshooting steps:
Look for LED lights on the DSC card. If the lights are off, try re-seating the card.
Verify that the DSI port adapter on the Cisco 7206 is inserted correctly.
Verify that the cable between the DSI port adapter and the DSC card is connected correctly.
From the Cisco 7206, verify that the DSI-Fast Ethernet interface and line protocol are up:
Router>show dsi
DSI-Fastethernet0/2/0 is up, line protocol is up
Hardware is DEC21140A, address is 0030.f2f5.1438 (bia 0030.f2f5.1438)
MTU 0 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s, 100BaseTX/FX
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters never
Queueing strategy: fifo
Output queue 0/40, 0 drops; input queue 0/75, 0 drops
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
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The following example shows a dial shelf interconnection that changes state to up after the DSC card
reloads. Loss of DSIP Keepalive messages indicate no communication between the router shelf and dial
shelf. After DSIP Hello messages succeed, the Fast Ethernet DSI-Tx 0 and DSI-Rx 1 change their state
to up. Until these interfaces are up, the router shelf and dial shelf cannot communicate. No debug
commands are used to create these console messages.
Router#
00:04:29: %DSIPPF-5-DS_KEEPALIVE_LOSS: DSIP Keepalive Loss from shelf 1 slot 12
00:04:31: %IPC-5-INVALID: Sequence Structure port index=0x0
-Traceback= 608AA970 608AB0A0 60881AF4 60889D50 608B3BC0 608B4C90
00:05:12: %DSIPPF-5-DS_HELLO: DSIP Hello from shelf 1 slot 12 Succeeded
00:05:18: %DIAL12-3-MSG:
00:00:03: %LINK-3-UPDOWN: Interface DSI-Tx-FastEthernet0, changed state to up
00:00:03: %LINK-3-UPDOWN: Interface DSI-Rx-FastEthernet1, changed state to up
00:00:03: %LINK-3-UPDOWN: Interface Ethernet0, changed state to up
Router#
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The following DSIP Keepalive and DSIP Hello messages appear on the console after the DSC card is
physically removed from slot 12 and re-inserted. Approximately 120 seconds elapse before these
messages appear on the terminal session.
Router>
04:41:42: %DSC_REDUNDANCY-3-BICLINK: Link to active DSC down [ Pobierz całość w formacie PDF ]