Cisco NX-OS/IOS BGP (Advanced) Comparison - Revision history

Cobeam at 22:28, 17 November 2012

2012-11-17T22:28:39Z

← Older revision		Revision as of 22:28, 17 November 2012
Line 11:		Line 11:
	<font size = "3">'''Important Cisco NX-OS and Cisco IOS Software Differences'''</font>		<font size = "3">'''Important Cisco NX-OS and Cisco IOS Software Differences'''</font>

-	In Cisco NX-O:	+	In Cisco NX-OS:
	* When configuring route reflectors, the '''route-reflector-client''' command is assigned per neighbor under the neighbor-specific address family.		* When configuring route reflectors, the '''route-reflector-client''' command is assigned per neighbor under the neighbor-specific address family.
	* When configuring confederations, the confederation is configured under the autonomous system without the leading '''bgp''' keyword.		* When configuring confederations, the confederation is configured under the autonomous system without the leading '''bgp''' keyword.

Cobeam at 22:28, 17 November 2012

2012-11-17T22:28:28Z

← Older revision		Revision as of 22:28, 17 November 2012
Line 11:		Line 11:
	<font size = "3">'''Important Cisco NX-OS and Cisco IOS Software Differences'''</font>		<font size = "3">'''Important Cisco NX-OS and Cisco IOS Software Differences'''</font>

-	In Cisco NX-OS:	+	In Cisco NX-O:
	* When configuring route reflectors, the '''route-reflector-client''' command is assigned per neighbor under the neighbor-specific address family.		* When configuring route reflectors, the '''route-reflector-client''' command is assigned per neighbor under the neighbor-specific address family.
	* When configuring confederations, the confederation is configured under the autonomous system without the leading '''bgp''' keyword.		* When configuring confederations, the confederation is configured under the autonomous system without the leading '''bgp''' keyword.

Kepacell at 17:51, 24 January 2011

2011-01-24T17:51:53Z

← Older revision		Revision as of 17:51, 24 January 2011
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	<font size = "3">'''BGP Overview'''</font>		<font size = "3">'''BGP Overview'''</font>

-	BGPv4 is a standard exterior routing protocol defined in RFC 4271, commonly used to exchange network reachability information between autonomous systems. This document discusses route reflectors, confederations, peer templates, route-map policies and the prefix-~~lists~~ feature.	+	BGPv4 is a standard exterior routing protocol defined in RFC 4271, commonly used to exchange network reachability information between autonomous systems. This document discusses route reflectors, confederations, peer templates, route-map policies and the prefix-list (route-filtering) feature.

Kepacell at 00:13, 23 January 2011

2011-01-23T00:13:30Z

← Older revision		Revision as of 00:13, 23 January 2011
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	{\| border="1" cellpadding="2"		{\| border="1" cellpadding="2"
-	!width="~~300~~" align="left" style="background:#99CCFF;" \|'''Cisco NX-OS BGP'''	+	!width="270" align="left" style="background:#99CCFF;" \|'''Cisco NX-OS BGP'''
-	!width="~~300~~" align="left" style="background:#99CCFF;" \|'''Cisco IOS Software BGP'''	+	!width="270" align="left" style="background:#99CCFF;" \|'''Cisco IOS Software BGP'''
	!width="450" align="left" style="background:#99CCFF;" \|'''Command Description'''		!width="450" align="left" style="background:#99CCFF;" \|'''Command Description'''
		+	\|-
		+	\|'''show bgp convergence \|\| - \|\| Displays global convergence information
		+	\|-
		+	\|'''show bgp process \|\| - \|\| Displays global BGP process information
		+	\|-
		+	\|'''show bgp sessions \|\| - \|\| Displays information for all neighbors
		+	\|-
		+	\|'''show bgp statistics \|\| - \|\| Displays global BGP process statistics
		+	\|-
		+	\| <font color="white"> - \|\| <font color="white"> - \|\| <font color="white"> -
	\|-		\|-
	\|'''show ip bgp''' ''<option>''\|\| show ip bgp \|\| Displays BGP Process and BGP table entries		\|'''show ip bgp''' ''<option>''\|\| show ip bgp \|\| Displays BGP Process and BGP table entries
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	\|-		\|-
	\|'''show ip bgp community no-export-spoofed'''\|\| - \|\| Displays BGP routes not sent to outside local AS		\|'''show ip bgp community no-export-spoofed'''\|\| - \|\| Displays BGP routes not sent to outside local AS
		+	\|-
		+	\|<b>show ip bgp community-list</b> <i><name></i>\|\| show ip bgp community-list <i><name></i> \|\| Displays a specific BGP community list
	\|-		\|-
	\|'''show ip bgp dampening dampened-paths'''\|\| show ip bgp dampening dampened-paths \|\| Displays all Dampened paths		\|'''show ip bgp dampening dampened-paths'''\|\| show ip bgp dampening dampened-paths \|\| Displays all Dampened paths
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	\|-		\|-
	\|'''show ip bgp dampening parameters'''\|\| show ip bgp dampening parameters \|\| Displays all of the Dampening parameters		\|'''show ip bgp dampening parameters'''\|\| show ip bgp dampening parameters \|\| Displays all of the Dampening parameters
		+	\|-
		+	\|'''show ip bgp extcommunity''' ''<word>''\|\| - \|\| Displays routes with a specific regular expression for extended communities
		+	\|-
		+	\|'''show ip bgp extcommunity-list''' ''<name>''\|\| - \|\| Displays a specific BGP extended community list
	\|-		\|-
	\|'''show ip bgp filter-list'''\|\| show ip bgp filter-list \|\| Displays all routes matching a specified filter list		\|'''show ip bgp filter-list'''\|\| show ip bgp filter-list \|\| Displays all routes matching a specified filter list
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	\|'''show ip bgp neighbors''' ''x.x.x.x''\|\| show ip bgp neighbors ''x.x.x.x'' \|\| Displays detailed information for a neighbor		\|'''show ip bgp neighbors''' ''x.x.x.x''\|\| show ip bgp neighbors ''x.x.x.x'' \|\| Displays detailed information for a neighbor
	\|-		\|-
-	\|'''show ip bgp ~~nexhop~~ ''' ''x.x.x.x''\|\| - \|\| Displays all routes matching a specified next-hop	+	\|'''show ip bgp nexthop ''' ''x.x.x.x''\|\| - \|\| Displays all routes matching a specified next-hop
		+	\|-
		+	\|'''show ip bgp nexthop-database''' \|\| - \|\| Displays the next-hop database
	\|-		\|-
	\|'''show ip bgp paths'''\|\| show ip bgp paths \|\| Displays all BGP paths		\|'''show ip bgp paths'''\|\| show ip bgp paths \|\| Displays all BGP paths
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	\|-		\|-
	\|'''show ip bgp regexp'''\|\| show ip bgp regexp \|\| Displays routes matching a regular-expression		\|'''show ip bgp regexp'''\|\| show ip bgp regexp \|\| Displays routes matching a regular-expression
		+	\|-
		+	\|'''show ip bgp received-paths'''\|\| - \|\| Displays the paths stored for soft reconfiguration
	\|-		\|-
	\|'''show ip bgp route-map'''\|\| show ip bgp route-map \|\| Displays BGP routes matching a route-map		\|'''show ip bgp route-map'''\|\| show ip bgp route-map \|\| Displays BGP routes matching a route-map

Kepacell at 23:47, 4 January 2011

2011-01-04T23:47:55Z

← Older revision		Revision as of 23:47, 4 January 2011
Line 259:		Line 259:

	{\| border="1" cellpadding="2"		{\| border="1" cellpadding="2"
-	!width="~~225~~" align="left" style="background:#99CCFF;" \|'''Cisco NX-OS BGP'''	+	!width="300" align="left" style="background:#99CCFF;" \|'''Cisco NX-OS BGP'''
	!width="300" align="left" style="background:#99CCFF;" \|'''Cisco IOS Software BGP'''		!width="300" align="left" style="background:#99CCFF;" \|'''Cisco IOS Software BGP'''
	!width="450" align="left" style="background:#99CCFF;" \|'''Command Description'''		!width="450" align="left" style="background:#99CCFF;" \|'''Command Description'''

Kepacell at 23:47, 4 January 2011

2011-01-04T23:47:30Z

← Older revision		Revision as of 23:47, 4 January 2011
Line 260:		Line 260:
	{\| border="1" cellpadding="2"		{\| border="1" cellpadding="2"
	!width="225" align="left" style="background:#99CCFF;" \|'''Cisco NX-OS BGP'''		!width="225" align="left" style="background:#99CCFF;" \|'''Cisco NX-OS BGP'''
-	!width="~~225~~" align="left" style="background:#99CCFF;" \|'''Cisco IOS Software BGP'''	+	!width="300" align="left" style="background:#99CCFF;" \|'''Cisco IOS Software BGP'''
	!width="450" align="left" style="background:#99CCFF;" \|'''Command Description'''		!width="450" align="left" style="background:#99CCFF;" \|'''Command Description'''
	\|-		\|-

Kepacell at 20:52, 12 August 2009

2009-08-12T20:52:40Z

← Older revision		Revision as of 20:52, 12 August 2009
Line 9:		Line 9:


-	<font size = "3">'''Important Cisco NX-OS and Cisco IOS ~~Softfware~~ Differences'''</font>	+	<font size = "3">'''Important Cisco NX-OS and Cisco IOS Software Differences'''</font>

	In Cisco NX-OS:		In Cisco NX-OS:

Kepacell: New page: '''Objective''' This tech note outlines the main differences in advanced Border Gateway Protocol (BGP) support between Cisco® NX-OS Software and Cisco IOS® Soft...

2009-06-11T16:34:41Z

New page: '''Objective''' This tech note outlines the main differences in advanced Border Gateway Protocol (BGP) support between Cisco® NX-OS Software and Cisco IOS® Soft...

New page

'''Objective'''

This tech note outlines the main differences in advanced Border Gateway Protocol (BGP) support between Cisco® NX-OS Software and Cisco IOS® Software. Sample configurations are included for Cisco NX-OS and Cisco IOS Software for some common features to demonstrate the similarities and differences. Please refer to the [http://www.cisco.com/en/US/products/ps9402/products_installation_and_configuration_guides_list.html NX-OS documentation on Cisco.com] for a complete list of supported features.

'''BGP Overview'''

BGPv4 is a standard exterior routing protocol defined in RFC 4271, commonly used to exchange network reachability information between autonomous systems. This document discusses route reflectors, confederations, peer templates, route-map policies and the prefix-lists feature.

'''Important Cisco NX-OS and Cisco IOS Softfware Differences'''

In Cisco NX-OS:
* When configuring route reflectors, the '''route-reflector-client''' command is assigned per neighbor under the neighbor-specific address family.
* When configuring confederations, the confederation is configured under the autonomous system without the leading '''bgp''' keyword.
* Cisco NX-OS uses a peer template instead of a peer group to reuse common BGP policies.
* Multiple policy templates can be applied to a single neighbor. Cisco IOS Software allows only one policy template per neighbor.
* Cisco NX-OS does not require a manual reset for a neighbor when its routing policy is modified. Cisco IOS Software requires a hard or soft reset depending on the neighbor capabilities exchanged.

'''Things You Should Know'''

The following list provides some additional facts about Cisco NX-OS that should be helpful when designing, configuring, and maintaining an advanced BGP network configuration.

* Peer and session templates define neighbor attributes such as security passwords, timers, and transport options.
* Peer templates and session templates have identical configuration capabilities with one exception: peer templates can configure address families.
* Peer and session templates are inherited by a neighbor through the BGP neighbor configuration mode.
* Only one peer template and session template can be inherited by a single BGP neighbor.
* Peer templates can inherit session templates.
* Session templates can inherit other session templates.
* Policy templates define address-family policies for inbound or outbound polices, including default-route origination, filter lists, route-map polices, prefix lists, etc.
* Multiple policy templates can be assigned per neighbor. Policy templates are executed in order based on the configured sequence number.
* Policy templates are inherited by a neighbor through the neighbor and address-family configuration mode.
* Route-map polices can configure BGP attributes such as as-path, community lists, community attributes, dampening, local preference, metric type, origin, and weight.
* Route-map polices can be applied per neighbor for inbound and outbound routing policies.

'''Configuration Comparison'''

The following sample code shows the configuration similarities and differences between the Cisco NX-OS and Cisco IOS Software CLIs. The configurations are very similar with the exception of the hierarchy used in Cisco NX-OS.

{| border="0" cellpadding="2" cellspacing="6"
!width="475" align="center" |'''''Cisco IOS CLI'''''
!width="475" align="center" |'''''Cisco NX-OS CLI'''''
|-
|'''Configuring a Route-Reflector'''
|-
{| border="0" cellpadding="2" cellspacing="6"
!width="475" align="left" style="background:#ED9121;" |'''router bgp 10
no synchronization

network 192.168.11.1 mask 255.255.255.255

neighbor 192.168.2.1 remote-as 10

neighbor 192.168.2.1 update-source Loopback0

neighbor 192.168.2.1 route-reflector-client

no auto-summary

!width="475" align="left" style="background:#99CCFF;" |'''router bgp 10
address-family ipv4 unicast

network 192.168.11.1/32

neighbor 192.168.2.1 remote-as 10

update-source loopback0

address-family ipv4 unicast

route-reflector-client
|-
{| border="0" cellpadding="2" cellspacing="6"
|'''Configuring Confederations'''
|-
{| border="0" cellpadding="2" cellspacing="6"
!width="475" align="left" style="background:#ED9121;" |'''router bgp
no synchronization

bgp confederation identifier 10

bgp confederation peers 65535

network 192.168.11.1 mask 255.255.255.255

neighbor 192.168.10.2 remote-as 65535

no auto-summary'''
!width="475" align="left" style="background:#99CCFF;" |'''router bgp 65534
confederation identifier 10

confederation peers 65535

address-family ipv4 unicast

network 192.168.11.1/32

neighbor 192.168.10.2 remote-as 65535

address-family ipv4 unicast'''
|-
{| border="0" cellpadding="2" cellspacing="6"
|'''Configuring a Peer Template'''
|-
{| border="0" cellpadding="2" cellspacing="6"
!width="475" align="left" style="background:#ED9121;" |'''router bgp 10
no synchronization

network 192.168.11.1 mask 255.255.255.255

neighbor IBGP-Template peer-group

neighbor IBGP-Template password cisco123

neighbor IBGP-Template update-source Loopback0

neighbor 192.168.2.1 remote-as 10

neighbor 192.168.2.1 peer-group IBGP-Template

no auto-summary'''
!width="475" align="left" style="background:#99CCFF;" |'''router bgp 10
address-family ipv4 unicast

network 192.168.11.1/32

template peer IBGP-Template

password 3 a667d47acc18ea6b

update-source loopback0

address-family ipv4 unicast

neighbor 192.168.2.1 remote-as 10

inherit peer IBGP-Template'''
|-
{| border="0" cellpadding="2" cellspacing="6"
|'''Configuring a Policy Template'''
|-
{| border="0" cellpadding="2" cellspacing="6"
!width="475" align="left" style="background:#ED9121;" |'''router bgp 10
template peer-policy EBGP-Policy

default-originate

send-community

exit-peer-policy

no synchronization

network 192.168.11.1 mask 255.255.255.255

neighbor 192.168.10.2 remote-as 20

neighbor 192.168.10.2 inherit peer-policy EBGP-Policy

no auto-summary'''
!width="475" align="left" style="background:#99CCFF;" |'''router bgp 10
address-family ipv4 unicast

network 192.168.11.1/32

template peer-policy EBGP-Policy

send-community

default-originate

neighbor 192.168.10.2 remote-as 20

address-family ipv4 unicast

inherit peer-policy EBGP-Policy 10'''
|-
{| border="0" cellpadding="2" cellspacing="6"
|'''Configuring an Outbound Neighbor Route-Map Policy'''
|-
{| border="0" cellpadding="2" cellspacing="6"
!width="475" align="left" style="background:#ED9121;" |'''route-map EBGP-Policy permit 10

set as-path prepend 10 10 10

router bgp 10

no synchronization

network 192.168.11.1 mask 255.255.255.255

neighbor 192.168.10.2 remote-as 20

neighbor 192.168.10.2 route-map EBGP-Policy out

no auto-summary'''
!width="475" align="left" style="background:#99CCFF;" |'''route-map EBGP-Policy permit 10
set as-path prepend 10 10 10

router bgp 10

address-family ipv4 unicast

network 192.168.11.1/32

neighbor 192.168.10.2 remote-as 20

address-family ipv4 unicast

route-map EBGP-Policy out'''
|-
{| border="0" cellpadding="2" cellspacing="6"
|'''Configuring an Outbound Prefix-List'''
|-
{| border="0" cellpadding="2" cellspacing="6"
!width="475" align="left" style="background:#ED9121;" |'''ip prefix-list EBGP-Policy seq 5 permit 192.168.11.1/32

router bgp 10

no synchronization

neighbor 192.168.10.2 remote-as 20

neighbor 192.168.10.2 prefix-list EBGP-Policy out

no auto-summary'''
!width="475" align="left" style="background:#99CCFF;" |'''ip prefix-list EBGP-Policy seq 5 permit 192.168.11.1/32

router bgp 10

neighbor 192.168.10.2 remote-as 20

address-family ipv4 unicast

prefix-list EBGP-Policy out'''
|-
{| border="0" cellpadding="2" cellspacing="6"
|}

'''Verification Command Comparison'''

The following table compares some useful '''show''' commands for verifying and troubleshooting a BGP network configuration.

{| border="1" cellpadding="2"
!width="225" align="left" style="background:#99CCFF;" |'''Cisco NX-OS BGP'''
!width="225" align="left" style="background:#99CCFF;" |'''Cisco IOS Software BGP'''
!width="450" align="left" style="background:#99CCFF;" |'''Command Description'''
|-
|'''show ip bgp''' ''<option>''|| show ip bgp || Displays BGP Process and BGP table entries
|-
|'''show ip bgp''' ''x.x.x.x''|| show ip bgp ''x.x.x.x'' || Displays a specific network in the BGP table
|-
|'''show ip bgp''' ''x.x.x.x'' '''vrf'''|| - || Displays a network in a specified VRF BGP table
|-
|'''show ip bgp''' ''x.x.x.x/len''|| show ip bgp ''x.x.x.x'' ''mask'' || Displays a specific prefix in the BGP table
|-
|'''show ip bgp''' ''x.x.x.x/len'' '''longer-prefix'''|| show ip bgp ''x.x.x.x mask'' longer-prefix || Displays a prefix in the table with longer prefixes
|-
|'''show ip bgp all'''|| show ip bgp all || Displays the BGP table for all protocol families
|-
|'''show ip bgp community''' ''<word>''|| show ip bgp community ''<#>'' || Displays routes with a specific regular expression
|-
|'''show ip bgp community ''' ''<aa:nn>''|| - || Displays routes with a specific community value
|-
|'''show ip bgp community internet'''|| - || Displays BGP routes advertised to the Internet
|-
|'''show ip bgp community no-advertise'''|| show ip bgp community no-advertise || Displays BGP routes not advertised to peers
|-
|'''show ip bgp community no-export'''|| show ip bgp community no-export || Displays BGP routes not exported to next AS
|-
|'''show ip bgp community no-export-spoofed'''|| - || Displays BGP routes not sent to outside local AS
|-
|'''show ip bgp dampening dampened-paths'''|| show ip bgp dampening dampened-paths || Displays all Dampened paths
|-
|'''show ip bgp dampening flap-statistics'''|| show ip bgp dampening flap-statistics || Displays flap statistics for BGP routes
|-
|'''show ip bgp dampening history-paths'''|| - || Displays all history paths
|-
|'''show ip bgp dampening parameters'''|| show ip bgp dampening parameters || Displays all of the Dampening parameters
|-
|'''show ip bgp filter-list'''|| show ip bgp filter-list || Displays all routes matching a specified filter list
|-
|'''show ip bgp flap-statistics'''|| - || Displays all BGP route flap statistics
|-
|'''show ip bgp ipv4 multicast <option>'''|| show ip bgp ipv4 multicast <option> || Displays BGP IPv4 multicast address families
|-
|'''show ip bgp ipv4 unicast <option>'''|| show ip bgp ipv4 unicast <option> || Displays BGP IPv4 unicast address families
|-
|'''show ip bgp neighbors'''|| show ip bgp neighbors || Displays detailed neighbor information
|-
|'''show ip bgp neighbors''' ''x.x.x.x''|| show ip bgp neighbors ''x.x.x.x'' || Displays detailed information for a neighbor
|-
|'''show ip bgp nexhop ''' ''x.x.x.x''|| - || Displays all routes matching a specified next-hop
|-
|'''show ip bgp paths'''|| show ip bgp paths || Displays all BGP paths
|-
|'''show ip bgp peer-policy'''|| - || Displays BGP peer policy by specified name
|-
|'''show ip bgp peer-session'''|| - || Displays information about a peer session
|-
|'''show ip bgp peer-template'''|| show ip bgp unicast ipv4 template || Displays information about a peer template
|-
|'''show ip bgp prefix-list'''|| show ip bgp prefix-list || Displays routes matching a specified prefix-list
|-
|'''show ip bgp regexp'''|| show ip bgp regexp || Displays routes matching a regular-expression
|-
|'''show ip bgp route-map'''|| show ip bgp route-map || Displays BGP routes matching a route-map
|-
|'''show ip bgp summary'''|| show ip bgp summary || Displays a summary list of neighbors and statistics
|-
|'''show ip bgp vrf'''|| show ip bgp vpnv4 vrf || Displays information for a specified BGP VRF
|-
|}