root zone

в логах после обновления появилось
general: warning: checkhints: d.root-servers.net/A (128.8.10.90) extra record in hints


обновим корневую зону
dig @a.root-servers.net. . ns > new-root.zone

rate-limit на интерфейсе

вариант 1

ip access-list extended 2000
permit ip any host 10.0.0.22

ip access-list extended 2699
permit ip any any

interface GigabitEthernet0/1.8
rate-limit output access-group 2000 8192000 1536000 3072000 conform-action transmit exceed-action drop
.....
rate-limit output access-group 2699 256000 65536 131072 conform-action transmit exceed-action drop



sh run
....
!
interface GigabitEthernet0/1.8
 description 9
 encapsulation dot1Q 11
 ip address 10.1.1.1 255.255.255.192 secondary
 ip address 10.0.0.1 255.255.255.192
 ip flow ingress
 ip flow egress
 rate-limit output access-group 2000 8192000 1536000 3072000 conform-action transmit exceed-action drop
 rate-limit output access-group 2699 256000 65536 131072 conform-action transmit exceed-action drop
 no cdp enable
!
.....
access-list 2000 permit ip any host 10.0.0.22
access-list 2699 permit ip any any


Читать дальше →

mtr


[root@ns3 ~]# mtr -r -c50 11.112.234.236
HOST: ns3.host96.ru               Loss%   Snt   Last   Avg  Best  Wrst StDev
  1. 192.168.23.1                  0.0%    50    0.3   1.1   0.3   7.1   1.7
  2. 10.220.1.20                   0.0%    50    0.5   1.4   0.4  18.7   2.9
  3. 85-2.ru                       0.0%    50    3.4   2.1   0.5  23.8   3.8
  4. 192.168.99.13                 0.0%    50    0.7   3.2   0.5  17.7   5.0
  5. kt12-1-gw.spb.------.ru       0.0%    50    0.8   6.8   0.6 190.2  28.1
  6. m9-3-gw.msk.******.ru         0.0%    50   10.3  14.3  10.2 115.7  15.0
  7. gi-1-14.r2-m9.*********.net   0.0%    50   13.6  12.5  10.1  29.8   4.6
  8. u**********x.net             24.0%    50   41.9  46.5  40.8 198.0  25.4
  9. 82.*.*.181                    0.0%    50   41.2  43.0  40.6  72.9   4.9
 10. 172.18.8.10                   4.0%    50   42.1  48.1  41.0 150.3  16.8
 11. 11.112.234.236                2.0%    50   42.2  43.4  41.3  58.7   3.7
[root@ns3 ~]#

update ios


en
copy tftp://10.10.1.12/cisco/ios-ver.bin flash:/
conf t
boot system flash:/ios-ver.bin
exit
reload

сброс пароля на Cisco 3550

1. включаем консольный провод между пк и циской, запускаем терминал.
2. выключаем циску, если была включена
3. зажать кнопку MODE и включить питание, отпустить кнопку только после того как погаснет индикатор fa0/1.

switch: flash_init

3)смотрим содержимое
switch: dir flash:

4)убираем старый конфиг
switch: rename flash:config.text flash:config.text.old

5)загрузим систему
switch: boot

ping: sendto: No buffer space available

давно такое не встречал :)

смотрим.
zabbix-proxy# netstat -m
50/730/780 mbufs in use (current/cache/total)
32/230/262/524288 mbuf clusters in use (current/cache/total/max)
32/224 mbuf+clusters out of packet secondary zone in use (current/cache)
0/128/128/8576 4k (page size) jumbo clusters in use (current/cache/total/max)
0/0/0/4288 9k jumbo clusters in use (current/cache/total/max)
0/0/0/2144 16k jumbo clusters in use (current/cache/total/max)
76K/1154K/1231K bytes allocated to network (current/cache/total)
0/0/0 requests for mbufs denied (mbufs/clusters/mbuf+clusters)
0/0/0 requests for jumbo clusters denied (4k/9k/16k)
0/0/0 sfbufs in use (current/peak/max)
0 requests for sfbufs denied
0 requests for sfbufs delayed
0 requests for I/O initiated by sendfile
0 calls to protocol drain routines
zabbix-proxy#



zabbix-proxy# netstat -id
Name    Mtu Network       Address              Ipkts Ierrs Idrop    Opkts Oerrs  Coll Drop
de0    1500 <Link#1>      00:15:5d:15:02:8c 26863978     0     0 26179780     0     0  906
de0    1500 91.001.002.0/ zabbix-proxy      24461808     -     - 23811747     -     -    -
de0    1500 172.19.1.48/2 172.19.1.53            103     -     -  2356689     -     -    -
ipfw0 65536 <Link#2>                               0     0     0        0     0     0    0
lo0   16384 <Link#3>                             140     0     0      140     0     0    0
lo0   16384 fe80:3::1     fe80:3::1                0     -     -        0     -     -    -
lo0   16384 localhost     ::1                      0     -     -        0     -     -    -
lo0   16384 your-net      localhost              140     -     -      140     -     -    -
zabbix-proxy#


меняем ситуацию в sysctl.conf.

net.inet.tcp.sendspace=131072
net.inet.tcp.recvspace=131072

net.inet.tcp.sendbuf_max=16777216
net.inet.tcp.recvbuf_max=16777216

net.inet.tcp.sendbuf_inc=16384
net.inet.tcp.recvbuf_inc=524288

kern.ipc.maxsockbuf=1048576
kern.ipc.nmbclusters=524288


zabbix-proxy# vmstat -z | grep mbuf
ITEM                     SIZE     LIMIT      USED      FREE  REQUESTS  FAILURES
mbuf_packet:              256,        0,       32,      224, 27256724,        0
mbuf:                     256,        0,       14,      510, 70586157,        0
mbuf_cluster:            2048,   524288,      256,        6,      256,        0
mbuf_jumbo_page:         4096,     8576,        0,      128,  1076992,        0
mbuf_jumbo_9k:           9216,     4288,        0,        0,        0,        0
mbuf_jumbo_16k:         16384,     2144,        0,        0,        0,        0
mbuf_ext_refcnt:            4,        0,        0,        0,        0,        0


при этом уже добавив

acl

conf t
interface GigabitEthernet0/2
 ip access-group in_block in
exit
!
ip access-list extended in_block
 deny   udp any any eq ntp log
 permit udp host 91.1.1.1 host 91.1.1.3 eq domain
 permit udp host 91.1.1.1 host 91.1.1.13 eq domain
 permit tcp host 91.1.1.1 any
 permit icmp host 91.1.1.1 any
!



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Percona Data Recovery Tool for InnoDB

Everything './configure's fine but when I run make, I get:
 /usr/bin/ld: cannot find -lrt


yum install libaio-devel glibc-static


https://launchpad.net/percona-data-recovery-tool-for-innodb