Dump traffic on routing-instance with a Juniper SRX firewall
A Juniper firewall can display data with the tcpdump command:
% tcpdump -i ge-0/0/0
% tcpdump -i vlan10
However, if the interface or the VLAN is assigned to a routing instance, the traffic is not captured. Is there a way to do it ?
juniper juniper-junos juniper-srx tcpdump
edited Apr 2 at 9:35
Cown
6,91131031
asked Apr 2 at 9:15
NakruleNakrule
20926
add a comment |
A Juniper firewall can display data with the tcpdump command:
% tcpdump -i ge-0/0/0
% tcpdump -i vlan10
However, if the interface or the VLAN is assigned to a routing instance, the traffic is not captured. Is there a way to do it ?
juniper juniper-junos juniper-srx tcpdump
edited Apr 2 at 9:35
Cown
6,91131031
asked Apr 2 at 9:15
NakruleNakrule
20926
add a comment |
A Juniper firewall can display data with the tcpdump command:
% tcpdump -i ge-0/0/0
% tcpdump -i vlan10
However, if the interface or the VLAN is assigned to a routing instance, the traffic is not captured. Is there a way to do it ?
juniper juniper-junos juniper-srx tcpdump
edited Apr 2 at 9:35
Cown
6,91131031
asked Apr 2 at 9:15
NakruleNakrule
20926
A Juniper firewall can display data with the tcpdump command:
% tcpdump -i ge-0/0/0
% tcpdump -i vlan10
However, if the interface or the VLAN is assigned to a routing instance, the traffic is not captured. Is there a way to do it ?
juniper juniper-junos juniper-srx tcpdump
juniper juniper-junos juniper-srx tcpdump
edited Apr 2 at 9:35
Cown
6,91131031
asked Apr 2 at 9:15
NakruleNakrule
20926
edited Apr 2 at 9:35
Cown
6,91131031
asked Apr 2 at 9:15
NakruleNakrule
20926
edited Apr 2 at 9:35
Cown
6,91131031
edited Apr 2 at 9:35
Cown
6,91131031
edited Apr 2 at 9:35
Cown
6,91131031
6,91131031
asked Apr 2 at 9:15
NakruleNakrule
20926
asked Apr 2 at 9:15
NakruleNakrule
20926
asked Apr 2 at 9:15
NakruleNakrule
20926
20926
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
This works fine on the lower-end SRX models - try using the layer 3 interface bound to your VLAN eg:
tcpdump -i vlan.10
My configuration looks like this:
routing-instances {
TCPDUMP-TEST {
instance-type virtual-router;
interface vlan.10;
}
}
vlans {
v10-TEST {
vlan-id 10;
l3-interface vlan.10;
}
}
Bear in mind that you won't be able to see traffic that isn't directed at the RE (eg: destination IP address of vlan.10 interface). You also won't be able to see ICMP traffic, as this is processed via the PFE, rather than the RE.
answered Apr 2 at 12:38
Benjamin DaleBenjamin Dale
7,4291038
add a comment |
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1 Answer
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active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
This works fine on the lower-end SRX models - try using the layer 3 interface bound to your VLAN eg:
tcpdump -i vlan.10
My configuration looks like this:
routing-instances {
TCPDUMP-TEST {
instance-type virtual-router;
interface vlan.10;
}
}
vlans {
v10-TEST {
vlan-id 10;
l3-interface vlan.10;
}
}
Bear in mind that you won't be able to see traffic that isn't directed at the RE (eg: destination IP address of vlan.10 interface). You also won't be able to see ICMP traffic, as this is processed via the PFE, rather than the RE.
answered Apr 2 at 12:38
Benjamin DaleBenjamin Dale
7,4291038
add a comment |
This works fine on the lower-end SRX models - try using the layer 3 interface bound to your VLAN eg:
tcpdump -i vlan.10
My configuration looks like this:
routing-instances {
TCPDUMP-TEST {
instance-type virtual-router;
interface vlan.10;
}
}
vlans {
v10-TEST {
vlan-id 10;
l3-interface vlan.10;
}
}
Bear in mind that you won't be able to see traffic that isn't directed at the RE (eg: destination IP address of vlan.10 interface). You also won't be able to see ICMP traffic, as this is processed via the PFE, rather than the RE.
answered Apr 2 at 12:38
Benjamin DaleBenjamin Dale
7,4291038
add a comment |
This works fine on the lower-end SRX models - try using the layer 3 interface bound to your VLAN eg:
tcpdump -i vlan.10
My configuration looks like this:
routing-instances {
TCPDUMP-TEST {
instance-type virtual-router;
interface vlan.10;
}
}
vlans {
v10-TEST {
vlan-id 10;
l3-interface vlan.10;
}
}
Bear in mind that you won't be able to see traffic that isn't directed at the RE (eg: destination IP address of vlan.10 interface). You also won't be able to see ICMP traffic, as this is processed via the PFE, rather than the RE.
answered Apr 2 at 12:38
Benjamin DaleBenjamin Dale
7,4291038
This works fine on the lower-end SRX models - try using the layer 3 interface bound to your VLAN eg:
tcpdump -i vlan.10
My configuration looks like this:
routing-instances {
TCPDUMP-TEST {
instance-type virtual-router;
interface vlan.10;
}
}
vlans {
v10-TEST {
vlan-id 10;
l3-interface vlan.10;
}
}
Bear in mind that you won't be able to see traffic that isn't directed at the RE (eg: destination IP address of vlan.10 interface). You also won't be able to see ICMP traffic, as this is processed via the PFE, rather than the RE.
answered Apr 2 at 12:38
Benjamin DaleBenjamin Dale
7,4291038
answered Apr 2 at 12:38
Benjamin DaleBenjamin Dale
7,4291038
answered Apr 2 at 12:38
Benjamin DaleBenjamin Dale
7,4291038
answered Apr 2 at 12:38
Benjamin DaleBenjamin Dale
7,4291038
7,4291038
add a comment |
add a comment |
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