Networking Video Data Network Configuration Issues Impacting IP Video

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NetworkingVideoData Network Configuration
Issues Impacting IP Video

• Frank Aversa, NJIT
• James Stankiewicz, Verizon

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Getting Started

• Know your Network
• Topology Create Layer 2 and Layer 3 Diagrams
• Devices Routers, Switches, Firewalls, Packet
  Shaper
• Protocols What is being used
• Health and Statistics
• Work with your Video Staff to define needs
• Number and Types of Codecs and bandwidth needs
• Location of Codecs
• H.323 and/or MPEG video
• Trouble Shooting Tools
• Ping
• Traceroute
• Looking Glasses Remote Traceroutes back
• BGP Route Information
• Sniffer tools

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Network IssuesWhich Affect Video

• Latency
• The time it takes for a packet to cross a network
  connection, from sender to receiver.
• The period of time that a frame is held by a
  network device before it is forwarded.
• Jitter
• A random variation in timing of packets (latency)
  in a data transmission. Latency is typically
  constant when it is not jitter occurs.
• Out of Sequence packets
• When jitter is present an earlier packet may
  arrive later then a subsequent packet. Buffering
  and reassembly in the codec can compensate,
  however, if it is persistent it can result in
  poor or lost data.

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Concerns

• Device/Codec
• Client Edge Switch
• Building, Core and Network Edge Switches
• Packet shaping
• Firewall
• Core Routers
• Network Edge Router

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Device/Codec

• Know the Basics
• Video
• Network
• Speed and Duplex
• Set IP Precedence to 4
• Is it Secured
• Change Default Passwords
• SNMP Communities
• Web Interface

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Client Edge Switch

• Configure Codec Port
• Remove Auto negotiate
• Enable Spanning Tree Port Fast
• Adequate Bandwidth (Who/What is on this switch)
• Port Statistics
• Spare port for Sniffer Span/Monitor
• QoS Marking
• QoS Queues

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Building, Core and NetworkEdge Switch

• Bandwidth Adequate
• Port Statistics
• Keep History
• 801q (VLANS or Access)
• Trusting QoS on Uplinks
• Spanning Tree
• ID and Designate Roots
• Install Route Guard

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Packet Shaping

• Size Packet Shaper appropriately
• Example 120 M to the Commodity Internet10 M
  Dedicated to I210 M to NJEDge ExtranetShould be
  configured to 40 M each Inbound and Outbound
• Example 1 20 M to Commodity Internet10 M
  Shared I2 and NJEDge ExtranetShould be
  configured to 30M each Inbound and Outbound
• Identify all Video Traffic using a Class
  Definition
• Static Addresses
• Protocols
• IP Precedence
• CIDR Network Definitions
• Separately ID H323 and MPEG video

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Packet Shaping

• Guarantee Minimum Call Bandwidth per Codec
• Permit Bursting to Maximum Bandwidth with higher
  priority (dont forget overhead)
• Example 3 Codecs maximum of 768k calls each.
• Create a partition of 3 768k 10 allow
  bursting with no limit
• Create policy to guarantee more bandwidth at
  higher priority 6
• /Inbound/VideoCodecs 2.54M-none Priority(6)
• /Outbound/VideoCodecs 2.54M-none Priority(6)

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Firewall

• Activate H.323 Fixup Protocol
• Permit inbound access to Gatekeeper
• Permit inbound access to Codecs

fixup protocol h323 h225 1718-1720 fixup protocol
h323 ras 1718-1719
name 192.168.40.10 YOURgk access-list
outside_access_in permit udp any host
192.168.40.10 range 1718 1720
name 192.168.1.20 Video1 name 192.168.3.65
Video2 access-list outside_access_in permit tcp
any host 192.168.1.20 eq h323 access-list
outside_access_in permit tcp any host
192.168.3.65 eq h323 pdm location 192.168.40.10
255.255.255.255 external pdm location
192.168.1.20 255.255.255.255 external pdm
location 192.168.3.65 255.255.255.255 external
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Firewall Future

• Current releases of PIX firewall (6.x) do support
  QoS 802.1p
• Future releases (7.x) will have this
  supportProjected release 1Q 2005

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Gatekeeper

• Provides admission control for video calls
• Manages Local and Remote Dial Plans

gatekeeper zone local gggg dddd ltethernet ip
addressgt zone remote njedge_portal_GK
njedge_portal_GK.net 130.156.34.2 1719 zone
prefix gggg 001zzznnnx zone prefix
njedge_portal_GK 001 no use-proxy gggg default
inbound-to terminal no use-proxy gggg default
outbound-from terminal no shutdown endpoint ttl
60 where gggg name of gatekeeper i.e.
Rutgersgk, fdugk, etc where dddd domain of
university...i.e. rutgers.edu, fdu.edu,
etc. where zzznnnx Endpoint Identifier- based
on main telephone number of school followed by an
asterisk (i.e. 0012017822) bandwidth interzone
default 5068 (allows up to 3 - 768k calls
bandwidth zone to zone 10 overhead (460k) for
call setup) bandwidth session default
1689 (allows max single call bandwidth of 768k
and 10 overhead) bandwidth remote 5068 (3 - 768k
calls and 10 over head from this member
gk-to-gk) no shutdown
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Core Routers

• Verify Router Tables
• Multicast
• Layer 2 to Layer 3 QoS transfer
• Apply QoS
• Preserve packet marking
• Example similar to Edge Router

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Network Edge Routers

• Mark/Remark at Network Edge Router

class-map match-any PRIORITY-DATA match
access-group 101 class-map match-any
REAL-TIME-VIDEO match access-group
104 class-map match-any PRIORITY-VOICE match
access-group 105 ! policy-map QoS-TO-NJEDge
class REAL-TIME-VIDEO bandwidth percent 51
set ip precedence 4 class PRIORITY-VOICE
bandwidth percent 15 set ip precedence 5
class PRIORITY-DATA bandwidth percent 15
set ip precedence 1 class class-default set
ip precedence 0
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interface ATM1/0.123 point-to-point description
Extranet PVC to NJEDge.NET bandwidth 10000 ip
address 130.156.X.Y 255.255.255.252 pvc 1/23
vbr-nrt 10000 10000 100 encapsulation aal5snap
service-policy output QoS-TO-NJEDge ! access-list
101 Remark Priority Data ! access-list 104
remark Priority Video access-list 104 remark
Video PC access-list 104 permit udp host
192.168.1.20 any access-list 104 permit tcp host
192.168.1.20 any range 1718 1720 access-list 104
remark Hardware Codec access-list 104 permit ip
host 192.168.3.65 any access-list 104 remark
GateKeeper Traffic access-list 104 permit udp
host 192.168.40.10 any access-list 104 permit tcp
host 192.168.40.10 any range 1718
1720 ! access-list 105 Remark Priority Voice
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Network Edge Routers

• Identify your interfaces and BGP neighbors

show ip interface brief Interface
IP-Address OK? Method Status
Protocol ATM1/0 unassigned
YES NVRAM up up
ATM1/0.123 130.156.X.Y YES
NVRAM up up show ip
bgp summary BGP router identifier
128.235.255.245, local AS number YOURASN BGP
table version is 7004286, main routing table
version 7004286 157585 network entries using
15916085 bytes of memory 311982 path entries
using 14975136 bytes of memory 85253 BGP path
attribute entries using 5115720 bytes of
memory 50355 BGP AS-PATH entries using 1340626
bytes of memory 0 BGP route-map cache entries
using 0 bytes of memory 0 BGP filter-list cache
entries using 0 bytes of memory BGP using
37347567 total bytes of memory BGP activity
438960/281375 prefixes, 2561413/2249431 paths,
scan interval 60 secs Neighbor V AS
MsgRcvd MsgSent TblVer InQ OutQ Up/Down
State/PfxRcd D.E.F.G 4 4246 1972187
627578 7004286 0 0 4w3d
147109 130.156.X.Z 4 19262 211980 45637
7004285 0 0 2w1d 8858 151.198.A.B
4 19262 1124094 45636 7004282 0 0 4w1d
156013
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Network Edge Routers

• Verify your Path and Connectivity (Extranet)

ping 130.156.38.100 Type escape sequence to
abort. Sending 5, 100-byte ICMP Echos to
130.156.38.100, timeout is 2 seconds !!!!! Succes
s rate is 100 percent (5/5), round-trip
min/avg/max 4/4/4 ms traceroute
130.156.38.100 Type escape sequence to
abort. Tracing the route to pccc.edu
(130.156.38.100) 1 A3-0-0-139.EDGE-RTR2.NWRK.ve
rizon-gni.net (130.156.250.97) 0 msec 4 msec 0
msec 2 130.156.250.14 AS 19262 4 msec 4 msec
4 msec 3 pccc.edu (130.156.38.100) AS 19262 4
msec 0 msec 4 msec
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Network Edge Routers

• Verify your Path and Connectivity (Internet)

traceroute www.scifi.com Translating
"www.scifi.com"...domain server (128.235.251.10)
OK Type escape sequence to abort. Tracing the
route to www.scifi.com (66.77.88.100) 1
A4-0-0-262.EDGE-RTR1.NWRK.verizon-gni.net
(151.198.30.9) 0 msec 0 msec 0 msec 2
so-2-2-0-0.CORE-RTR1.NWRK.verizon-gni.net
(130.81.7.165) AS 19262 4 msec 0 msec 4 msec
3 so-0-2-0-0.BB-RTR2.NWRK.verizon-gni.net
(130.81.7.157) AS 19262 0 msec 4 msec 0 msec
4 so-5-0-0-0.BB-RTR1.NY5030.verizon-gni.net
(130.81.7.189) AS 19262 24 msec 8 msec 28 msec
5 so-7-0-0-0.BB-RTR2.NY5030.verizon-gni.net
(130.81.8.74) AS 19262 8 msec 8 msec 0 msec 6
so-6-0-0-0.BB-RTR1.NY60.verizon-gni.net
(130.81.8.250) AS 19262 4 msec 4 msec 4 msec
7 so-1-0-0-0.PEER-RTR1.NY60.verizon-gni.net
(130.81.4.210) AS 19262 4 msec 4 msec 4 msec
8 jfk-edge-20.inet.qwest.net (65.116.172.85) AS
209 4 msec 4 msec 4 msec 9 jfk-core-01.inet.qwe
st.net (205.171.230.14) AS 209 4 msec 0 msec 0
msec 10 jfk-core-02.inet.qwest.net
(205.171.230.2) AS 209 4 msec 0 msec 0 msec 11
ewr-core-01.inet.qwest.net (205.171.8.245) AS
209 4 msec 4 msec 4 msec 12 ewr-core-02.inet.qwe
st.net (205.171.17.2) AS 209 12 msec 16 msec 16
msec 13 iah-core-01.inet.qwest.net
(205.171.8.205) AS 209 44 msec 44 msec 44 msec
14 iah-core-02.inet.qwest.net (205.171.31.2) AS
209 52 msec 52 msec 40 msec 15
bur-core-01.inet.qwest.net (205.171.205.25) AS
209 76 msec 76 msec 80 msec 16
bur-core-03.inet.qwest.net (205.171.13.6) AS
209 76 msec 76 msec 72 msec 17
buc-cntr-02.inet.qwest.net (205.171.13.162) AS
209 76 msec 76 msec 72 msec 18
msfc-36.buc.qwest.net (66.77.125.170) AS 209 76
msec 72 msec 76 msec 19 63.146.120.9 AS 209 72
msec 76 msec 72 msec 20 (Use
CTRL-SHIFT-6 to terminate)
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Network Edge Routers

• Verify BGP Routes

sh ip bgp sum BGP
router identifier 128.235.255.245, local AS
number 4246 BGP table version is 7004728, main
routing table version 7004728 157582 network
entries using 15915782 bytes of memory 311992
path entries using 14975616 bytes of memory 85246
BGP path attribute entries using 5115120 bytes of
memory 50344 BGP AS-PATH entries using 1340198
bytes of memory 0 BGP route-map cache entries
using 0 bytes of memory 0 BGP filter-list cache
entries using 0 bytes of memory BGP using
37346716 total bytes of memory BGP activity
438980/281398 prefixes, 2561522/2249530 paths,
scan interval 60 secs Neighbor V AS
MsgRcvd MsgSent TblVer InQ OutQ Up/Down
State/PfxRcd 128.235.249.102 4 4246 1972382
627649 7004728 0 0 4w3d
147104 130.156.250.97 4 19262 211998 45650
7004725 0 0 2w1d 8858 151.198.30.9
4 19262 1124237 45648 7004721 0 0 4w1d
156028
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Network Edge Routers

• Verify BGP Routes

sh ip bgp 66.77.88.100 BGP routing table entry
for 66.77.88.0/23, version 6139058 Paths (1
available, best 1, table Default-IP-Routing-Table
) Advertised to non peer-group peers
128.235.249.102 19262 209 151.198.30.9
from 151.198.30.9 (130.81.254.139) Origin
IGP, metric 200967, localpref 50, valid,
external, best sh ip bgp 130.156.38.100 BGP
routing table entry for 130.156.38.0/24, version
3262783 Paths (2 available, best 1, table
Default-IP-Routing-Table) Advertised to non
peer-group peers 128.235.249.102 19262
130.156.250.97 from 130.156.250.97
(130.81.255.27) Origin IGP, metric 0,
localpref 200, valid, external, best 19262
151.198.30.9 from 151.198.30.9 (130.81.254.139)