Cisco Regular Expression

Found this regular expression from CCIE Pursuit blogs. Follow this cisco link.

Useful Header Drawings

Found this useful header drawings, thanks to Hexis for the work.

IP Header 8.5″x11″ PDF
IP Header 11″x17″ PDF
IP Header 800×1050 PNG

IPv6 Header 8.5″x11″ PDF
IPv6 Header 800×1050 PNG

TCP Header 8.5″x11″ PDF
TCP Header 11″x17″ PDF
TCP Header 800×1050 PNG

UDP and ICMP Headers 8.5″x11″ PDF
UDP and ICMP Headers 800×1050 PNG

Reference: http://www.visi.com/~mjb/Drawings/

ICMP Parameters Reference

On this link you’ll find:

ICMP Type Numbers, Code Fields and ICMP Extension Objects Classes

Reference: http://www.iana.org/assignments/icmp-parameters

Supported DSCP Values for TOS Testing

		DSCP Class/
Decimal	Binary**	IP Precedence	Service Classification	Ping Value
20	010 100	AF22	BE	80
24	011 000	IP Precedence 3	Silver	96
26	011 010	AF31	Silver	104
28	011 100	AF32	BE	112
30	011 110	AF33	BE	120
40	101 000	IP Precedence 5	Gold	160
46	101 110	EF***	Gold	184
48	110 000	IP Precedence 6	Silver	192
56	111 000	IP Precedence 7	Silver	224

Troubleshooting Tips for Serial Lines

Alarm Types
-If a Tx Alarm Indication Signal (AIS) appears, check if the line is administratively shutdown.
-If a Tx Remote Alarm Indication (RAI) appears, check the settings at the remote site.—Troubleshoot the accompanying alarms and errors.
-If the Rcv AIS appears, contact your SP.
-If the Rcv RAI appears, check the cabling, contact TELCO

Controllers Status

-Slip Secs Counter Increasing
If slips are present on the E1 line, there is a clocking problem. The Customer Premises Equipment (CPE) will need to synchronize to the clocking from the E1 provider (telco). Complete the following steps to correct this problem:

1. Ensure the clock source is derived from the network. In the show controller e1 EXEC command output, look for Clock Source is Line Primary.

Note: If there are multiple E1s into an access server, only one can be the primary source. The other E1s derive the clock from the primary source. If there are multiple E1s, ensure the E1 line designated as the primary clock source is configured correctly. You may also configure a second E1 line to provide clocking in case the primary source goes down. To do this, use the clock source line secondary command from controller configuration mode.

2. Set the E1 clock source from controller configuration mode. For example:

certproject-01(config-controller)#clock source line

Framing Loss Seconds Increasing
Follow these instructions when dealing with a framing loss seconds increase.

1. Ensure the framing format configured on the port matches the framing format of the line. Look for Framing is {crc4|no-crc4} in the show controller e1 output.

2. To change the framing format, use the framing {crc4|no-crc4} command in the controller configuration mode. For example:

certproject-01(config-controller)#framing crc4

Line Code Violations Increasing
Ensure the line coding configured on the port matches the line coding of the line. Look for Line Code is HDB3 in the show controller e1 output.

If Line Code Violations keep increasing, contact your Service Provider to check the E1 line as Line Code Violations can also be caused by physical line problems.

Path Code Violations Increasing
Ensure the framing format configured on the port matches the framig format of the line. Look for Framing is {crc4|no-crc4} in the show controller e1 output.

If Path Code Violations keep increasing, contact your Service Provider to check the E1 line as Path Code Violations can also be caused by physical line problems.

Default Mappings from 802.1p to WMM

Access Category	802.1p Priority
Platinum	6
Gold	5
Silver	3
Bronze	1

Defaults for RF Usage and Queue Depth

Access Category	RF Usage	Queue Depth
Platinum	100 percent	100
Gold	100 percent	75
Silver	100 percent	50
Bronze	100 percent	25

Four Access Categories Compared to Eight Priority Levels for 802.11e

Four Access Categories

WMM	802.11e
Voice	6 or 7
Video	4 or 5
Background	1 or 2
Best effort	0 or 3

QoS Packet-Marking Translations

Cisco 802.1p Priority-Based Traffic Type	DSCP Priority	802.1p Priority	IEEE 802.11e Priority
Reserved	56-62	7	7
IP Routing	48	6	7
Voice	46 (EF)	5	6
Video	34 (AF41)	4	5
Voice control	26 (AF31)	3	4
Background gold	18 (AF21)	2	2
Background silver	10 (Af11)	1	1
Best effort	0 (BE)	0	0 or 3

DSCP Values Assigned to AF Classes

AF Class	Drop Probability	DSCP Value
AF Class 1	AF11 (low)	001 01 0
	AF12 (medium)	001 10 0
	AF13 (high)	001 11 0
AF Class 2	AF21 (low)	010 01 0
	AF22 (medium)	010 10 0
	AF23 (high)	010 11 0
AF Class 3	AF31 (low)	011 01 0
	AF32 (medium)	011 10 0
	AF33 (high)	011 11 0
AF Class 4	AF41 (low)	100 01 0
	AF42 (medium)	100 10 0
	AF43 (high)	100 11 0