Здравствуйте.

Использую AS5400, как SIP-шлюз. Циска соединена с УПАТС 4 каналами ISDN PRI. Сотрудники удаленного офиса совершают звонки на шлюз, и далее пробрасываются на УПАТС. VPN-туннелей нет.

В настоящий момент при восьмидесяти одновременных входящих SIP-вызовах загрузка процессора держится около 90%. Основной "загрузчик" - IP INPUT. Можно ли что-то сделать в этом случае? Неужели это предельная нагрузка для AS5400?

Apollon_3-1#sh hard
Cisco IOS Software, 5400 Software (C5400-JS-M), Version 12.4(25a), RELEASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2009 by Cisco Systems, Inc.
Compiled Sat 23-May-09 02:30 by prod_rel_team
ROM: System Bootstrap, Version 12.2(1r)1, RELEASE SOFTWARE (fc1)
BOOTLDR: 5400 Software (C5400-BOOT-M), Version 12.1(1)XD1, EARLY DEPLOYMENT RELEASE SOFTWARE (fc2)
Apollon_3-1 uptime is 8 weeks, 2 days, 22 hours, 29 minutes
System returned to ROM by power-on
System restarted at 19:15:36 msd Mon Oct 1 2012
System image file is "flash:c5400-js-mz.124-25a.bin"
Cisco AS5400 (R7K) processor (revision T) with 524288K/131072K bytes of memory.
Processor board ID JAE09044FS2
R7000 CPU at 250MHz, Implementation 39, Rev 1.0, 256KB L2, 2048KB L3 Cache
Last reset from power-on
Manufacture Cookie Info:
EEPROM Type 0x0001, EEPROM Version 0x01, Board ID 0x31,
Board Hardware Version 3.34, Item Number 800-5171-02,
Board Revision C0, Serial Number JAE09044FS2,
PLD/ISP Version 2.2,  Manufacture Date 19-Jan-2005.
Processor 0x14, MAC Address 0012.801c.64da
Backplane HW Revision 1.0, Flash Type 5V
2 FastEthernet interfaces
254 Serial interfaces
324 terminal lines
8 Channelized E1/PRI ports
512K bytes of NVRAM.
65536K bytes of processor board System flash (Read/Write)
16384K bytes of processor board Boot flash (Read/Write)

Apollon_3-1#sh processes cpu sort | exclude 0.00
CPU utilization for five seconds: 76%/22%; one minute: 82%; five minutes: 81%
PID Runtime(ms)   Invoked      uSecs   5Sec   1Min   5Min TTY Process
  67  11498207081850528907        621 43.23% 39.35% 39.79%   0 IP Input
140    34929036 179468097        194  1.72%  1.51%  1.43%   0 RADIUS
  64    21518312   6710350       3206  1.55%  1.08%  0.96%   0 AAA ACCT Proc
157    15815048   9970804       1586  0.98%  0.01%  0.92%   0 CCH323_CT
149    18764784  20460061        917  0.90%  0.80%  0.75%   0 VTSP
153    19030656  87456303        217  0.81%  0.75%  0.76%   0 VOIP_RTCP
  71       10124     36860        274  0.65%  0.06%  0.01%   2 Virtual Exec
   3    13050712  18629860        700  0.65%  0.61%  0.61%   0 AFW_application_
159    21326176   7317868       2914  0.57%  0.65%  0.64%   0 CCSIP_SPI_CONTRO
141    16783164   8849683       1896  0.49%  0.70%  0.66%   0 ISDN
174     8392904  34992922        239  0.49%  0.41%  0.34%   0 ISDN L2 Process
  59      205928  18287511         11  0.40%  0.23%  0.21%   0 IP SLA Mon Event
148    14869188  77456247        191  0.40%  0.61%  0.64%   0 DSMP
138    19920208   1067614      18658  0.32%  0.35%  0.37%   0 Compute load avg
   4     3266556   5423805        602  0.24%  0.13%  0.14%   0 EDDRI_MAIN
178     1875996 421510412          4  0.16%  0.10%  0.11%   0 ss7_mtp2_timerba
  51     2421436 112303374         21  0.16%  0.14%  0.14%   0 Call Management
176     1892604  24230301         78  0.08%  0.05%  0.06%   0 ISDN L2D SRQ Pro
145     1350184  24483127         55  0.08%  0.04%  0.02%   0 ISDN From Driver
  85     1082780  96742446         11  0.08%  0.04%  0.05%   0 ss7_mtp2
161     5194236   8595580        604  0.08%  0.12%  0.13%   0 CCSIP_UDP_SOCKET
  32     2689952   7074711        380  0.08%  0.09%  0.11%   0 Logger
127     1979792   9188960        215  0.08%  0.09%  0.08%   0 AAA SEND STOP EV

Apollon_3-1#sh interfaces fastEthernet 0/0
FastEthernet0/0 is up, line protocol is up
  Hardware is AMD79c971 FE, address is 0012.821c.64da (bia 0012.821c.64da)
  Internet address is 81.81.81.81/24
  MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
     reliability 255/255, txload 10/255, rxload 12/255
  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
  Input queue: 60/4096/0/124003581 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/4096 (size/max)
  5 minute input rate 4937000 bits/sec, 3163 packets/sec
  5 minute output rate 4288000 bits/sec, 2815 packets/sec
     2127676176 packets input, 2584228777 bytes
     Received 13700725 broadcasts, 0 runts, 0 giants, 0 throttles
     139963567 input errors, 139963534 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog
     0 input packets with dribble condition detected
     1537266790 packets output, 201311164 bytes, 0 underruns
     0 output errors, 0 collisions, 4 interface resets
     1959 unknown protocol drops
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier
     0 output buffer failures, 0 output buffers swapped out