cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
467
Views
5
Helpful
4
Replies

Throughput impact from routing inside networks

emily00001
Level 1
Level 1

I have ASA models 5515X & 5516X serving different office networks. They each have a slightly modified default policy-map and provide routing between inside networks where most traffic is controlled through security level or some simple ACLs.

Would traffic between inside networks count towards the stateful inspection throughput in how it affects the firewalls total throughput or would this traffic be subject to additional inspection/processing and have additional performance impact? I'm inclined to assume that the policy map isn't doing any inspection on inside to inside traffic but maybe that assumption is incorrect? What is the default behavior when no customization is done to the policy or class map defaults?

4 Replies 4

Ajay Saini
Level 7
Level 7

Hello,

Sorry, but the requirement/query is not clear. I believe that you have a question if policy-map would inspect some set of traffic. But the traffic flow is not clear. Can you describe clearly the ingress and egress path for your traffic and also attach following outputs:

show run policy-map

show run service-policy

Regards,

-

AJ

Hi,

Apologies for the late reply.

Let's assume traffic is from a host on Office1 (vlan 3) to either Inside (vlan1) or Office2 (vlan 4) and it's ftp traffic? Would it matter if the traffic was on a non-standard port like 2021?

I think your question kind of gave me the puzzle piece I wanted but let's say I want to only use the inspection in the policy-map on the outside interface. Then I would set up the the service-policy as follows? And that would inspect traffic passing that interface in both directions but not between the inside, office1 and office2 interfaces?

service-policy global_policy interface outside

What is the performance-impact of the policy-map inspection? I guess it might be different for each protocol but I can't find any documentation that would help me understand how to design and optimize.

Also if I have a scenario where I want the maximum throughput between Office1 and Office2, would that be considered as stateful inspection in the data sheet (for the 5516X 1.8 Gbps) or could the firewall perform even faster than that if I did set up multiple interfaces in a channel-group?

I'm posting the configuration that I have shortened, redacted and done some renaming on.

Type help or '?' for a list of available commands.
ciscoasa> enable
ciscoasa# show running-config
: Saved
:
: Serial Number: <redacted>
: Hardware: ASA5515, 8192 MB RAM, CPU Clarkdale 3058 MHz, 1 CPU (4 cores)
:
ASA Version 9.2(4)
!
hostname ciscoasa
enable <redacted>
passwd <redacted>
names
!
interface GigabitEthernet0/0
nameif outside
security-level 0
ip address <redacted>
!
interface GigabitEthernet0/1
no nameif
no security-level
no ip address
!
interface GigabitEthernet0/1.1
description Inside Main VLAN
vlan 1
nameif inside
security-level 100
ip address 10.10.1.1 255.255.255.0
!
interface GigabitEthernet0/1.2
description Inside Guest
vlan 2
nameif guest
security-level 10
ip address 10.10.2.1 255.255.255.0
!
interface GigabitEthernet0/1.3
description Office1
vlan 3
nameif Office1
security-level 95
ip address 10.10.3.1 255.255.255.0
!
interface GigabitEthernet0/1.4
description Office2
vlan 4
nameif Office2
security-level 90
ip address 10.10.4.1 255.255.255.0
!
interface GigabitEthernet0/2
shutdown
no nameif
no security-level
no ip address
!
interface GigabitEthernet0/3
shutdown
no nameif
no security-level
no ip address
!
interface GigabitEthernet0/4
shutdown
no nameif
no security-level
no ip address
!
interface GigabitEthernet0/5
shutdown
no nameif
no security-level
no ip address
!
interface Management0/0
management-only
nameif management
security-level 100
ip address 192.168.1.1 255.255.255.0
!
boot system disk0:/images/asa924-smp-k8.bin
ftp mode passive
dns domain-lookup outside
dns server-group DefaultDNS
name-server 8.8.8.8
name-server 8.8.4.4
object network snmp-server
host 10.10.1.20
object-group network Inside-Networks
network-object 10.10.1.0 255.255.255.0
object-group network Guest-Networks
network-object 10.10.2.0 255.255.255.0
object-group network Office1-Networks
network-object 10.10.3.0 255.255.255.0
object-group network Office2-Networks
network-object 10.10.4.0 255.255.255.0
access-list outside-to-inside extended permit tcp any host 10.10.1.20 eq ssh
access-list Office1-to-inside extended permit tcp any host 10.10.1.20 eq ssh
access-list Office1-to-inside extended permit tcp any host 10.10.1.20 eq www
access-list Office1-to-inside permit tcp any host 10.10.1.20 eq ftp
access-list Office1-to-inside extended deny ip any 10.10.1.0 255.255.255.0
access-list Office1-to-inside extended permit ip 10.10.3.0 255.255.255.0 any
pager lines 24
logging enable
logging trap informational
logging asdm informational
logging host inside 10.10.1.20
logging permit-hostdown
mtu outside 1500
mtu inside 1500
mtu guest 1500
mtu Office1 1500
mtu Office2 1500
mtu management 1500
no failover
icmp unreachable rate-limit 1 burst-size 1
asdm image disk0:/asdm-66114.bin
no asdm history enable
arp timeout 14400
no arp permit-nonconnected
!
object network snmp-server
nat (inside,outside) static interface service tcp ssh 1322
!
nat (inside,outside) after-auto source dynamic Inside-Networks interface
nat (guest,outside) after-auto source dynamic Guest-Networks interface
nat (Office1,outside) after-auto source dynamic Office1-networks interface
nat (Office2,outside) after-auto source dynamic Office2-networks interface
access-group outside-to-inside in interface outside
access-group Office1-to-inside in interface Office1
route outside 0.0.0.0 0.0.0.0 <redacted> 1
timeout xlate 3:00:00
timeout pat-xlate 0:00:30
timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 icmp 0:00:02
timeout sunrpc 0:10:00 h323 0:05:00 h225 1:00:00 mgcp 0:05:00 mgcp-pat 0:05:00
timeout sip 0:30:00 sip_media 0:02:00 sip-invite 0:03:00 sip-disconnect 0:02:00
timeout sip-provisional-media 0:02:00 uauth 0:05:00 absolute
timeout tcp-proxy-reassembly 0:01:00
timeout floating-conn 0:00:00
dynamic-access-policy-record DfltAccessPolicy
user-identity default-domain LOCAL
aaa authentication ssh console LOCAL
http server enable 4443
http 192.168.1.0 255.255.255.0 management
http 0.0.0.0 0.0.0.0 inside
snmp-server host inside 10.10.1.20 community *****
no snmp-server location
no snmp-server contact
snmp-server community *****
crypto <redacted>
crypto <redacted>
telnet timeout 5
ssh stricthostkeycheck
ssh 0.0.0.0 0.0.0.0 outside
ssh 10.10.1.0 255.255.255.0 inside
ssh timeout 30
ssh version 2
ssh key-exchange group dh-group1-sha1
console timeout 0
dhcpd domain <redacted>
!
dhcpd address 10.10.1.21-10.10.1.254 inside
dhcpd dns 8.8.8.8 8.8.4.4 interface inside
dhcpd option 43 hex f1040a0a0102 interface inside
dhcpd enable inside
!
dhcpd address 10.10.2.21-10.10.2.254 guest
dhcpd dns 8.8.8.8 8.8.4.4 interface guest
dhcpd enable guest
!
dhcpd address 10.10.3.21-10.10.3.254 Office1
dhcpd dns 8.8.8.8 8.8.4.4 interface Office1
dhcpd enable Office1
!
dhcpd address 10.10.4.21-10.10.4.254 Office2
dhcpd dns 8.8.8.8 8.8.4.4 interface Office2
dhcpd enable Office2
!
dhcpd address 192.168.1.2-192.168.1.254 management
dhcpd enable management
!
threat-detection basic-threat
threat-detection statistics access-list
no threat-detection statistics tcp-intercept
ntp server 10.10.1.11 source inside
webvpn
anyconnect-essentials
username <redacted>
username <redacted>
!
class-map inspection_default
match default-inspection-traffic
!
!
policy-map type inspect dns preset_dns_map
parameters
message-length maximum client auto
message-length maximum 512
policy-map global_policy
class inspection_default
inspect dns preset_dns_map
inspect ftp
inspect h323 h225
inspect h323 ras
inspect rsh
inspect sqlnet
inspect skinny
inspect sunrpc
inspect xdmcp
inspect sip
inspect netbios
inspect tftp
inspect ip-options
inspect pptp
inspect icmp
policy-map global-policy
!
service-policy global_policy global
prompt hostname context
no call-home reporting anonymous
password <redacted>
Cryptochecksum:<redacted>
: end

Farhan Mohamed
Cisco Employee
Cisco Employee

But the traffic flow is not clear. Can you describe clearly the ingress and egress path for your traffic and also attach following outputs:

show run policy-map

show run service-policy

If anything better comes up i will let you know, Let me know the scenario. if it doesn't work or the failure path.

Hi,

I have posted that in my reply to Ajay Saini's comment further down (where both those are sections in the show run).

If the traffic flow is still not clear I can express it as ingress being GigabitEthernet0/1.3 and egress being GigabitEthernet0/1.1.

Review Cisco Networking for a $25 gift card