EIGRP Stub Leak is a feature on Cisco router which allows EIGRP stub routers to leak route to peer routers. This is achieved by leak-map, which is a route map that permit specific route to leak through. A video is recorded to demonstrate how it works:
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Chinese (Cantonese) version:
My environment: Nexus 7010, NX-OS 4.2
Just got a chance to play with the Nexus 7000 NX-OS QoS, the “mls qos” syntax has gone and now all the commands are based on MQC.
In the following example, I’m going to configure 2 ingress ports, one with high priority traffic and one with normal traffic, and at egress port high priority traffic will be assigned to PQ to dequeue first.
Classification
N7K# conf t
class-map type queuing match-any 1p3q4t-out-pq1
match cos 5
It can only be done via the main VDC. It can’t be done on child VDC. And you can ONLY match cos in the class-map.
Marking
Now let’s mark the ingress traffic, I will do this at the port assigned to the vdc “test”.
N7K# switchto vdc test
N7K-test#
policy-map type queuing highpriority-in-policy
class type queuing 2q4t-in-q-default
set cos 5
Scheduling and Queuing
Finally, I want to assign the high priority traffic (cos=5) to PQ
N7K-test#
policy-map type queuing highpriority-out-policy
class type queuing 1p3q4t-out-pq1
priority level 1
Last step is to assign service policy to the interface:
N7K-test#
int e3/1
description - High Priority – Ingress -
service-policy type queuing input highpriority-in-policy
!
int e3/2
description – Low Priority – Ingress -
!
int e3/3
description – Egress Port -
service-policy type queuing output highpriority-out-policy
!
load 7962 SCCP42.8-4-2S.loadsYou might see this error after issuing the above load command:
My environment: Cisco 3560E
Besides shutting down the switchport, you can turn off the PoE power via the Energywise command. Before you run this script, setup your energywise domain with the command “energywise domain panda security shared-secret eatsbamboo”
#!/usr/bin/expect
set timeout 5
log_user 1
set hostlist "pandasw01"
set prompt "pandasw01"
foreach host $hostlist {
#set prompt [append $host "#"]
set promptcfg [append $prompt "(config)#"]
spawn telnet $host
expect $prompt
send "conf t\r"
expect $promptcfg
send "int range fa0/1 - 23\r"
expect $promptcfg
send "energywise level 0\r"
expect $promptcfg
send "end\r"
expect $prompt
send "exit\r"
}
My environment: Cisco 861W
You can turn off the radio interface of the autonomous AP when you don’t use it to save power.
#!/usr/bin/expect
set timeout 5
log_user 1
set hostlist "pandaap01"
foreach host $hostlist {
set prompt [append $host "#"]
set promptcfg [append $prompt "(config)#"]
spawn telnet $host
expect $prompt
send "conf t\r"
expect $promptcfg
send "int dot11radio0\r"
expect $promptcfg
send "shut\r"
expect $promptcfg
send "end\r"
}
A handy expect script on Linux to backup your routers, switches, AP, or other IOS devices configuration. Make sure you have “expect” installed on your Linux box.
#!/usr/bin/expect
set timeout 5
log_user 1
# Include your hosts in the hostlist
set hostlist "rt01 rt02 sw01 sw02"
foreach host $hostlist {
set prompt [append $host "#"]
spawn telnet $host
expect $prompt
send "term len 0\r"
expect $prompt
set time [exec date \+\%y\%m\%dT\%H\%MJ]
set filename [append host "-" $time]
# The config file storage location
log_file /home/pandaeatsbamboo/cfgbackup/$filename
send "show run\r"
expect $prompt
send "exit\r"
log_file
}
My environment: Cisco 3560E, IOS 12.2(53)SE
Auto Smartports Macros is a feature that provide easy and automatic way in deploying switchport configuration based on the endpoint types. The device is identified based on CDP, MAC address, OUI etc.
To enable Auto Smartports:
macro auto global processing
You might want to change the Auto Smarport Macro default value say for example the access and voice vlan, say for example if you want to change the IP phone access vlan to 10 and voice vlan to 20:
macro auto device phone ACCESS_VLAN=10 VOICE_VLAN=20
to verify the change, type:
show macro auto device
If the end device doesn’t support CDP, you can classify the device based on OUI (the first 3 bytes of the MAC address) or full MAC address. Say for example you want to use mac address trigger for your digital media player (DMP) which is not defined in the default OUI list.
macro auto mac-address group DMP-MAC-GROUP
mac-address list 000f.1234.5678
macro auto execute DMP-MAC-GROUP built-in CISCO_DMP_AUTO_SMARTPORT ACCESS_VLAN=10
to verify, type:
show macro auto address-group
To see which port applies what macros:
show macro auto interface
show run interface gi0/16
My environment: Apache 2.2.9 on Fedora Core 10 x86_64
Although it is not a good idea to do something like this, I’ve come across a case that I need to mount a CIFS drive and serve the content inside for an apache web server on Linux. After some googling, the trick to make this work is to turn off a parameter called EnableSendfile in httpd.conf
#
# EnableSendfile: Control whether the sendfile kernel support is
# used to deliver files (assuming that the OS supports it).
# The default is on; turn this off if you serve from NFS-mounted
# filesystems. Please see
# http://httpd.apache.org/docs/2.2/mod/core.html#enablesendfile
#
EnableSendfile off
